2Sin(90градусов +x)cos(90градусов -x)=sin(x+180градусов)

Question

2Sin(90градусов +x)cos(90градусов -x)=sin(x+180градусов)

Answer 1

-2cosx*sinx=-sinx
sinx(1-2cosx)=0
sinx=0  x=Пk
cosx=1/2
x=+-П/3+2Пk