Question

СРОЧНО
sin2x+sin6x+√3 cos2x=0
sin x+sin4+sin7x=0
sin2x+sin3x+sin8x+sin7x=0
2sin7 x sin6x+cos13x=cos п/6
4sin2xcos(п/6 - 2x)=3
4√3 cos 5x cos3x=2√3cos8x-3
sin7x cosl3x -sin x cosl19x = 0