Question

Find all solutions of the equation cos x (2 sin x + 1) = 0. on the

interval [0, 27).
The answers are A, B, C and D where 0 < A < B for T.
A =
B =
C=
D =

Answer 1

A = 0,

B = π/2,

C = 3π/2,

D = 2π

Explanation: