8 8b Trig Intro2

Identify the side by Trig Focus: review the use of sin, cos, and tan ratios (sohcahtoa)

Identify the side that is opposite angle YZX Z X Y Line segment XY Is opposite angle Z Hint: Identify the hypotenuse first that eliminates one possibility

Identify the side that is adjacent to angle YZX Z X Y Line segment XZ Is adjacent to angle Z

Identify the sides that are adjacent to AND opposite angle IHU U I H Line segment IH Is adjacent to angle IHU Line segment IU Is opposite to angle IHU hypotenuse

How long… ,[object Object],[object Object],[object Object],[object Object],[object Object],A B C 15 units 12 units 9 units Sin= 12/15 = .8000 Opposite of ACB is line segment AB – 12 units hypotenuse is line segment AC – 15 units Cos= 9/15 = .6000

How long… ,[object Object],[object Object],[object Object],[object Object],[object Object],x Y Z 24 units 25 units 7 units Sin= 24/25 = .9600 Opposite of angle 1 is 24 units hypotenuse is line segment AC 25 units Cos= 7/25 = .2800 1

What is… ,[object Object],[object Object],[object Object],h m i 8 units 6 units 10 units Cos= 8/10 = .8000 Sin= 6/10 = .6000 2 Tan= 6/8 = .7500

Use your Chart for the next two slides PAGE 668

Solve for x. 45 8 units X units 11.31units

What is the measure of side BT (the 52 degree angle)? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],r b t 18 units x units Tan 52= x/18 52 1.2799 = x/18 x =xxx units

8 8b Trig Intro2

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8 8b Trig Intro2