Use the Grapher to Determine Which of the Following Is $\sin ^{2} x-\cos x=1+2 \sin x$

Multiple Choice

Use the grapher to determine which of the following is an identity.

A) $\sin ^{2} x-\cos x=1+2 \sin x$
B) $\sin ^{3} x-\sin x=-\cos ^{2} x \sin x$
C) $\sin (x+\pi) =\sin x$
D) $\tan 2 x=2 \sin x \cos x$
E) $\cos 2 x+\sin 2 x=1$