1) √3 tg х - 3tg х = 0 tg x(√3 -3) = 0 tg х = 0 x = kπ. 2) сos⁴ x - sin⁴х =о (сos² x - sin²х)* (сos² x+ sin²х) = 0 cos2x *1 = 0 2x = 2kπ+-1 x =kπ+-(1/2)