Помоги те решить срочно. Номера 1,3,5,7,8
за ранее огромное спасибо

1) sin^2 x = 1sin x = -1, x1 = -pi/2 + 2pi*ksin x = 1, x2 = pi/2 + 2pi*k3) cos^2 x = cos xcos^2 x - cos x = 0cos x*(cos x - 1) = 0cos x = 0, x = pi/2 + pi*kcos x = 1, x = 2pi*k5) tg x = 3ctg xtg x = 3*1/tg xtg^2 x = 3tg x = -√3, x1 = -pi/3 + pi*ktg x = √3, x2 = pi/3 + pi*k7) 2sin^2 x + cos^2 x - 3sin x - 5 = 0sin^2 x + sin^2 x + cos^2 x - 3sin x - 5 = 0sin^2 x + 1 - 3sin x - 5 = 0sin^2 x  - 3sin x - 4 = 0(sin x - 4)(sin x + 1) = 0sin x = 4 - решений нетsin x = -1, x = -pi/2 + 2pi*k8) 2sin^2 x + 3cos x = 02 - 2cos^2 x + 3cos x = 02cos^2 x - 3cos x - 2 = 0(cos x - 2)(2cos x + 1) = 0cos x = 2 - решений нетcos x = -1/2x1 = 2pi/3 + 2pi*kx2 = 4pi/3 + 2pi*k