Question

Given cos 8 = and angle 6 is in Quadrant IV, what is the exact value of sin 0 in

simplest form? Simplify all radicals if needed.

Answer 1

cos0 = √3/2

1 - cos²0 = sin²0

= 1/4 = sin²0

sin in quadrant 4 is negative

sin0 = -1/2