помогите, как решать? 1) 6cos^2 x - 19cos x + 3 = 0 2) 8cos^2 x + 10sin x

August 2021 0 8 Report

помогите, как решать? 1) 6cos^2 x - 19cos x + 3 = 0 2) 8cos^2 x + 10sin x - 5 = 0 3) 2tg x + 5ctg x - 11 = 0 4) 3cos x - 5sin x = 0 5) 5sin^2 x + sin x = 0