Question

1. Find the exact value of sin 2u and cos 2u using the double angle formula
csc u = 3, pi/2 < u < pi

2. Rewrite 4-8 sin^2 x using a double angle formula

3. Find the exact value of sin 2u and cos 2u using the double angle formulas
cos u = -2/3, pi/2 < u < pi

4. Given 0 degrees < x < 90 degrees and sin x = 1/4, find sin 2x

5. Given 270 degrees < x < 360 degrees and cos x = 2/5, find the exact value of sin 2x

6. Given 0 degrees < x < 90 degrees and sin x = 1/4 , find cos 2x

7. Given 270 degrees< x< 360 degrees and cos x =2/5, find the exact value of cos 2x

8. Given sin x =