Question

Find all values of e in the interval oo se<360o that satisfy the equation sin20- sin 0.

Answer 1

sin 2θ = sin θ
2sin θ cos θ = sin θ
2cos θ = 1
cos θ = 1/2

`\theta = cos^(-1) (1)/(2) \\ \theta = ( \pi )/(3) \ or \ (5 \pi )/(3)`