Question:

For sin 2x + cos x = 0, use a double-angle or half-angle

Last updated: 8/8/2022

For sin 2x + cos x = 0, use a double-angle or half-angle

For sin 2x + cos x = 0, use a double-angle or half-angle formula to simplify the equation and then find all solutions of the equation in the interval [0, 2π). The answers are x1 = 12 x3 = x4 =