Factor;then Use Fundamental Identities to Simplify the Expression Below and Determine

Factor;then use fundamental identities to simplify the expression below and determine which of the following is not equivalent.​ $$\sin ^ { 3 } x - \sin ^ { 2 } x - \sin x + 1$$ ​

A) ​ $\cos ^ { 2 } x - \cos ^ { 2 } x \sin x$
B) ​ $\frac { 1 - \sin x } { \sec ^ { 2 } x }$
C) ​ $\frac { \cos ^ { 4 } x } { 1 + \sin x }$
D) ​ $\cos ^ { 2 } x ( 1 - \sin x )$
E) ​ $\frac { 1 + \cos ^ { 2 } x } { \sin x }$

Correct Answer:

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