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6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
6.4.1 sum and difference formulas
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6.4.1 sum and difference formulas

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  • 1. 6.4 Sum and Difference Formulas Using Sum/Difference to Find Exact Values (Angles Measured in Degrees)
  • 2. Sum and Difference Formulas for Cosine  cos cos cos sin sin         cos cos cos sin sin       
  • 3. Use Sum Formula to find exact value cos105  cos 60 45   cos60 cos45 sin60 sin45    1 2 3 2 2 2 2 2                      2 6 4 4   1 4 2 6
  • 4. Use Difference Formula to find exact valuecos105  cos 135 30   cos135 cos30 sin135 sin30    2 3 2 1 2 2 2 2                       6 2 4 4    1 4 2 6
  • 5. Sum and Difference Formulas for Sine  sin sin cos cos sin         sin sin cos cos sin       
  • 6. Use Sum Formula to find exact value sin75  sin 30 45   sin30 cos45 cos30 sin45    1 2 3 2 2 2 2 2                      2 6 4 4   1 4 2 6
  • 7. Use Difference Formula to find exact valuesin75  sin 120 45   sin120 cos45 cos120 sin45    3 2 1 2 2 2 2 2                       6 2 4 4   1 4 6 2
  • 8. Sum and Difference Formulas for Tangent   tan tan tan 1 tan tan             tan tan tan 1 tan tan          
  • 9. Use Sum Formula to find exact value tan195  tan 135 60   tan135 tan60 1 tan135 tan60         1 3 1 1 3      1 3 1 3    1 3 1 3    4 2 3 1 3     4 2 3 2    2 3 
  • 10. Use Difference Formula to find exact valuetan195  tan 240 45   tan 240 tan 45 1 tan 240 tan 45         3 1 1 3 1    3 1 1 3   1 3 1 3    4 2 3 1 3     4 2 3 2    2 3 
  • 11. Find the Exact Value sin65 cos25 cos65 sin25    sin cos cos sin     sin    sin 65 25   sin 90 1
  • 12. Find the Exact Value cos40 cos20 sin40 sin20    cos cos sin sin     cos    cos 40 20   cos 60 1 2
  • 13. ASSIGNMENT p. 481 # 2 - 8, 13 - 16, 21 - 26

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