sin2x — sinx=0 sin2x — cosx=0

sin (2x) -sin (x)=0sin (2x) -cos (x)=0sin (2x) -sin (x)=-cos (x)=0sin (2x)+cos (x)=sin (x) /\cos (x)=02sin (x) cos (x) -sin (x)=-cox (x)=0 2sin (x/2) cos (x/2) (2cos (x) -1)=-cos (x)=0