1) sin x = -1; x = 3pi/2 + 2pi*kx1 = 3pi/2 - 2pi = -pi/2; x2 = 3pi/22) cos x = 1/2; x = pi/3 + 2pi*k; x = -pi/3 + 2pi*kx1 = -pi/3; x2 = pi/3; x3 = -pi/3 + 2pi = 5pi/33) tg x = √3; x = pi/3 + pi*kx1 = pi/3 - 2pi = -5pi/3; x2 = pi/3 - pi = -2pi/3; x3 = pi/3; x4 = pi/3 + pi = 4pi/34) ctg x = -3; x = -arcctg(3) + pi*k ~ -0,32 рад + pi*kx1 = -arcctg(3); x2 = -arcctg(3) + pi; x3 = -arcctg(3) + 2pi5) 2sin^2 x - 7sin x + 5 = 0(sin x - 1)(2sin x - 5) = 0sin x = 5/2 - решений нетsin x = 1; x = pi/2 + 2pi*kx1 = pi/2 - 2pi = -3pi/2; x2 = pi/2