Simplify each expression. See Example 4.

cos² π/8 - 1/2

Simplify each expression. See Example 4.

tan 34°/2(1 - tan² 34°)

Simplify each expression. See Example 4.

⅛ sin 29.5° cos 29.5°

Simplify each expression. See Example 4.

cos² 2x - sin² 2x

Match each expression in Column I with its value in Column II.

(2 tan (π/3))/(1 - tan² (π/3))

Find values of the sine and cosine functions for each angle measure.

2θ, given cos θ = -12/13 and sin θ > 0