Given a = (cosx, SiNx), B = (SiNx, cosx), Let f (x) = a · B. to get the image of function y = sin4x-cox4x, we only need to change the image of function y = f (x) [ ] A. Shift left by units B. Right translation unit length C. Shift left by units D. Right translation unit length

Given a = (cosx, SiNx), B = (SiNx, cosx), Let f (x) = a · B. to get the image of function y = sin4x-cox4x, we only need to change the image of function y = f (x) [ ] A. Shift left by units B. Right translation unit length C. Shift left by units D. Right translation unit length


f(x)=sinxcosx+cosxsinx
=sin(x+x)
=sin2x
y=(sin²x+cos²x)(sin²x-cos²x)
=-cos2x
F (x) shift right / 4