Question

sin^2x-sin2x=0
Помогите

Answer 1

sin2x+2sin^2x=0
2*sin x*cos x+2sin^2x=0
2sinx(cosx+sinx)=0
2sinx=0    U  cosx+sinx=0
1)2sinx=0
sinx=0
x=Пк,k e Z
2)cosx+sinx=0 | :cosx
1+tgx=0
tgx=-1
x=3П/4+Пk, k e Z