д) 1+sin(x)-cos(2x)=0
(sin^2(x)+cos^2(x)) + sin(x) -(cos^2(x)-sin^2(x))=0
sin^2(x)+cos&2(x)+sin(x)-cos^2(x)+sin^2(x)=0
2sin^2(x)+sin(x)=0
sin(x)*(2sin(x)+1)=0
1) sin(x)=0
x=pi*n
2) 2sin(x)+1=0
sin(x)=-1/2
x=(-1)^n*arcsin(-1/2)+pi*n
x=7pi/6+pi*n
e) 1+cos(x)+cos(2x)=0
(cos^2(x)+sin^2(x))+cos(x)+(cos^2(x)-sin^2(x))=0
2cos^2(x)+cos(x)=0
cos(x)*(2cos(x)+1)=0
1) cos(x)=0
x=pi/2 +pi*n
2) 2cos(x)+1=0
cos(x)=-1/2
x=±2pi/3 +2pi*n