4(sinx-cosx)=(sinx-cosx)^2
sinx-cosx=0
tgx=1
x=pi/4+pik
sinx-cosx=1/4
sin(x-pi/4)=sqrt(2)/8
x=arcsin(sqrt(2)/8)+pi/4+2pik
x=П-arcsin(sqrt(2)/8)+pi/4+2pik
4(sinx-cosx)=(sinx-cosx)^2
sinx-cosx=0
tgx=1
x=pi/4+pik
sinx-cosx=1/4
sin(x-pi/4)=sqrt(2)/8
x=arcsin(sqrt(2)/8)+pi/4+2pik
x=П-arcsin(sqrt(2)/8)+pi/4+2pik