Tgx 2 cos x 0. TG^2 4x + 3tg 4x -4=0. TGX=3ctgx. Решение ctgx=-4-3tgx. TG X 3 CTG X. Sin x + cos x. Tg2x 1 cos2x. Sin x + cos x = 0. TG Х/2=(1-cos x)/sin x. 16sin 4x 8cos2x-7. 16sin4x+8cos2x-7 0. 16sin 4x 8cos2x-7 (0.5п;2п). Уравнение sin 2x+cos x=0. Cos2x-3sin(-x)-2=0