1) factor the expression and use the fundamental identities to simplify. there is more than one correct form of the answer.

6 tan2x − 6 tan2x sin2x

2) perform the addition or subtraction and use the fundamental identities to simplify. there is more than one correct form of the answer.

3/1+cos x + 3/1-cos x

3) rewrite the expression so that it is not in fractional form. there is more than one correct form of the answer.

(sin^2y)/1-cos y

4) use the trigonometric substitution to write the algebraic equation as a trigonometric equation of θ, where

−3sqrt1a. gif3=sqrt1a. gif36 − x2 , x= 6 cos θ

−3sqrt1a. gif3=

find sin θ and cos θ