This week we learned and reviewed sections of Chapter 8. In 8.5 we learned how to use identities to get to be the same. Trig function= if you can’t try to make it tan or cot by sin/cos or cos/sin. When you are working in 8.5 you will have to follow the inverse rules. There are things you can’t do in 8.5 and if u do them you will get the problem wrong. The things you can’t do are: Divide by a trig function when solving to cancel. Cancel from the inside of a trig function.
Ex: 2sin^2theta-1=0
1 trig function and has 1 term.
You move the 1 over.
You get 2sin^2theta=1.
Divide the 2 before sin by each side.
You get sin^2theta=1/2.
Square both sides.
Sin theta= + and – square root ½.
Do sin inverse square root ½.
You get 45.
Find Q2, Q3, Q4.
Q2 you do 180-45=135. Q3 you do 180+45=225. Q4 you do 360-45= 315.
Your
, 135 degrees, 225 degrees, 315 degrees.
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