Question

Sin2x + 2cos^2x = o


Решите пожалуйста! !!! Срочно

Answer 1

2sin x cos x + 2 cos^2 x = 0
2 cos x (sin x + cos x) = 0
cos x = 0 or sin x + cos x = 0
x = pi/2(2n + 1) or tg x = -1
x = pi/2 (2n + 1) or x = -pi/4 + pi m