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Trigonometric Equations
Trigonometric Equations
e.g.  i  tan   2.3673   0    360
Trigonometric Equations
e.g.  i  tan   2.3673   0    360
             Q2, Q4               locate quadrants
Trigonometric Equations
e.g.  i  tan   2.3673   0    360
             Q2, Q4               locate quadrants
           tan   2.3673        find acute angle
              67 6
Trigonometric Equations
e.g.  i  tan   2.3673       0    360
             Q2, Q4                   locate quadrants
           tan   2.3673             find acute angle
             67 6
     180   ,360        
                                               solve the problem
Trigonometric Equations
e.g.  i  tan   2.3673            0    360
             Q2, Q4                        locate quadrants
           tan   2.3673                  find acute angle
             67 6
     180   ,360             
                                                    solve the problem
     180  67 6,360  676
     11254, 29254
Trigonometric Equations
e.g.  i  tan   2.3673            0    360
             Q2, Q4                        locate quadrants
           tan   2.3673                  find acute angle
             67 6
     180   ,360             
                                                      solve the problem
     180  67 6,360  676
     11254, 29254
                  1
     ii  cos                       0    360
                  2
Trigonometric Equations
e.g.  i  tan   2.3673            0    360
             Q2, Q4                        locate quadrants
           tan   2.3673                      find acute angle
             67 6
     180   ,360             
                                                        solve the problem
     180  67 6,360  676
     11254, 29254
                  1
     ii  cos                       0    360
                  2
           Q1, Q4
                                           
                                           
Trigonometric Equations
e.g.  i  tan   2.3673            0    360
             Q2, Q4                        locate quadrants
           tan   2.3673                  find acute angle
             67 6
     180   ,360             
                                                      solve the problem
     180  67 6,360  676
     11254, 29254
                  1
     ii  cos                       0    360
                  2
           Q1, Q4
                  1                    
          cos                        

                  2
                60
Trigonometric Equations
e.g.  i  tan   2.3673            0    360
             Q2, Q4                        locate quadrants
           tan   2.3673                  find acute angle
             67 6
     180   ,360             
                                                       solve the problem
     180  67 6,360  676
     11254, 29254
                  1
     ii  cos                       0    360
                  2
           Q1, Q4                                         ,360  
                                       
          cos  
                  1                                      60 ,360  60
                  2
                                                          60 ,300
                60
 iii  cosec  4   0    360
 iii  cosec  4   0    360
               1
       sin  
               4
 iii  cosec  4       0    360
               1
       sin  
               4        
       Q1, Q2
 iii  cosec  4           0    360
               1
       sin  
               4            
       Q1, Q2
               1
       sin  
               4
             14 29
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29

 iv  2sin x  1  0        0  x  360
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29

 iv  2sin x  1  0        0  x  360
        2sin x  1
                   1
         sin x  
                   2
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29

 iv  2sin x  1  0        0  x  360
        2sin x  1
                   1
         sin x            

                   2
        Q3, Q4
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29

 iv  2sin x  1  0        0  x  360
        2sin x  1
                    1
          sin x           

                    2
        Q3, Q4
                 1
        sin  
                 2
              30
 iii  cosec  4           0    360
               1
       sin  
               4                         ,180  
       Q1, Q2
               1                          14 29,180  14 29
       sin  
               4                          14 29,16531
             14 29

 iv  2sin x  1  0        0  x  360
        2sin x  1                     x  180   ,360  
                    1                      180  30 ,360  30
          sin x           

                    2
        Q3, Q4                             210 ,330
                 1
        sin  
                 2
              30
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75              0    360
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75               0    360
                                  0  2  720
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75               0    360
                                  0  2  720
        Q1, Q4
                            
                            
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75               0    360
                                  0  2  720
        Q1, Q4
     cos   0.75           
                            
           41 25
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75               0    360
                                  0  2  720
        Q1, Q4
                                         2   ,360  
     cos   0.75           
                                       2  41 25,360  41 25
           41 25
                                        2  41 25,31835, 401 25,67835
 v  5sin   2cos           0    360
    sin  2
           
    cos  5
             2                               180   ,360  
    tan  
             5          
                                             180  21 48,360  21 48
        Q2, Q4
              2                               15812,33812
      tan  
              5
            21 48

 vi  cos 2  0.75               0    360
                                  0  2  720
        Q1, Q4
                                         2   ,360  
     cos   0.75           
                                       2  41 25,360  41 25
           41 25
                                        2  41 25,31835, 401 25,67835
                                           20 43,15918, 200 43,33918
 vii  sec2   tan   3   0    360
 vii  sec2   tan   3   0    360
 1  tan 2   tan   3
 tan 2   tan   2  0
 vii  sec2   tan   3       0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
 vii  sec2   tan   3            0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                  or             tan   1
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4
                             
                                 
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4
                             
  tan   2                      


        63 26
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4
                             
  tan   2                      


       63 26
  180   ,360  
  180  63 26,360  63 26
  11634, 29634
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4                                            Q1, Q3
                             
  tan   2                      
                                                                    
                                                                
       63 26
  180   ,360  
  180  63 26,360  63 26
  11634, 29634
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4                                            Q1, Q3
                             
  tan   2                      
                                                    tan   1           
                                                                    
       63 26                                            45
  180   ,360  
  180  63 26,360  63 26
  11634, 29634
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4                                            Q1, Q3
                             
  tan   2                      
                                                    tan   1            
                                                                     
       63 26                                          45
  180   ,360                                 ,180  
  180  63 26,360  63 26                   45 ,180  45
  11634, 29634                              45 , 225
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4                                            Q1, Q3
                             
  tan   2                      
                                                    tan   1            
                                                                     
       63 26                                          45
  180   ,360                                 ,180  
  180  63 26,360  63 26                   45 ,180  45
  11634, 29634                      45 , 225
                   45 ,11634, 225 , 29634
 vii  sec2   tan   3                0    360
 1  tan 2   tan   3
  tan 2   tan   2  0
  tan   2  tan   1  0
     tan   2                      or             tan   1
    Q2, Q4                                            Q1, Q3
                             
  tan   2                      
                                                    tan   1            
                                                                     
       63 26                                          45
  180   ,360                                 ,180  
  180  63 26,360  63 26                   45 ,180  45
  11634, 29634                      45 , 225
                   45 ,11634, 225 , 29634

    Exercise 4G; 1af, 2be, 3af, 4bfjo, 5b, 6ac, 7a, 8bd, 9aeg, 10af,
                        12a, 13b, 14d, 15*ag

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11 ext1 t4 4 trig equations (2013)

  • 2. Trigonometric Equations e.g.  i  tan   2.3673 0    360
  • 3. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants
  • 4. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6
  • 5. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem
  • 6. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem   180  67 6,360  676   11254, 29254
  • 7. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem   180  67 6,360  676   11254, 29254 1  ii  cos  0    360 2
  • 8. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem   180  67 6,360  676   11254, 29254 1  ii  cos  0    360 2 Q1, Q4  
  • 9. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem   180  67 6,360  676   11254, 29254 1  ii  cos  0    360 2 Q1, Q4 1  cos    2   60
  • 10. Trigonometric Equations e.g.  i  tan   2.3673 0    360 Q2, Q4 locate quadrants tan   2.3673 find acute angle   67 6   180   ,360     solve the problem   180  67 6,360  676   11254, 29254 1  ii  cos  0    360 2 Q1, Q4    ,360    cos   1    60 ,360  60 2   60 ,300   60
  • 11.  iii  cosec  4 0    360
  • 12.  iii  cosec  4 0    360 1 sin   4
  • 13.  iii  cosec  4 0    360 1 sin   4   Q1, Q2
  • 14.  iii  cosec  4 0    360 1 sin   4   Q1, Q2 1 sin   4   14 29
  • 15.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29
  • 16.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29  iv  2sin x  1  0 0  x  360
  • 17.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29  iv  2sin x  1  0 0  x  360 2sin x  1 1 sin x   2
  • 18.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29  iv  2sin x  1  0 0  x  360 2sin x  1 1 sin x     2 Q3, Q4
  • 19.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29  iv  2sin x  1  0 0  x  360 2sin x  1 1 sin x     2 Q3, Q4 1 sin   2   30
  • 20.  iii  cosec  4 0    360 1 sin   4      ,180   Q1, Q2 1   14 29,180  14 29 sin   4   14 29,16531   14 29  iv  2sin x  1  0 0  x  360 2sin x  1 x  180   ,360   1   180  30 ,360  30 sin x     2 Q3, Q4   210 ,330 1 sin   2   30
  • 21.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360
  • 22.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360 0  2  720
  • 23.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360 0  2  720 Q1, Q4  
  • 24.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360 0  2  720 Q1, Q4 cos   0.75     41 25
  • 25.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360 0  2  720 Q1, Q4 2   ,360   cos   0.75   2  41 25,360  41 25   41 25 2  41 25,31835, 401 25,67835
  • 26.  v  5sin   2cos 0    360 sin  2  cos  5 2   180   ,360   tan   5     180  21 48,360  21 48 Q2, Q4 2   15812,33812 tan   5   21 48  vi  cos 2  0.75 0    360 0  2  720 Q1, Q4 2   ,360   cos   0.75   2  41 25,360  41 25   41 25 2  41 25,31835, 401 25,67835   20 43,15918, 200 43,33918
  • 27.  vii  sec2   tan   3 0    360
  • 28.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0
  • 29.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0
  • 30.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1
  • 31.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4  
  • 32.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4  tan   2    63 26
  • 33.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4  tan   2    63 26   180   ,360     180  63 26,360  63 26   11634, 29634
  • 34.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4 Q1, Q3  tan   2      63 26   180   ,360     180  63 26,360  63 26   11634, 29634
  • 35.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4 Q1, Q3  tan   2  tan   1     63 26   45   180   ,360     180  63 26,360  63 26   11634, 29634
  • 36.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4 Q1, Q3  tan   2  tan   1     63 26   45   180   ,360      ,180     180  63 26,360  63 26   45 ,180  45   11634, 29634   45 , 225
  • 37.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4 Q1, Q3  tan   2  tan   1     63 26   45   180   ,360      ,180     180  63 26,360  63 26   45 ,180  45   11634, 29634   45 , 225   45 ,11634, 225 , 29634
  • 38.  vii  sec2   tan   3 0    360 1  tan 2   tan   3 tan 2   tan   2  0  tan   2  tan   1  0 tan   2 or tan   1 Q2, Q4 Q1, Q3  tan   2  tan   1     63 26   45   180   ,360      ,180     180  63 26,360  63 26   45 ,180  45   11634, 29634   45 , 225   45 ,11634, 225 , 29634 Exercise 4G; 1af, 2be, 3af, 4bfjo, 5b, 6ac, 7a, 8bd, 9aeg, 10af, 12a, 13b, 14d, 15*ag