Factor;then use fundamental identities to simplify the expression below and determine which of the following is not equivalent. $\cot ^ { 2 } \alpha - \cot ^ { 2 } \alpha \cos ^ { 2 } \alpha$
A) $\cos ^ { 2 } \alpha$
B) $\sin ^ { 2 } \left( \frac { \pi } { 2 } - \alpha \right)$
C) $1 - \sin ^ { 2 } \alpha$
D) $\cot ^ { 2 } \alpha$
E) $\frac { 1 } { \sec ^ { 2 } \alpha }$

Question

Factor;then use fundamental identities to simplify the expression below and determine which of the following is not equivalent.​ $\cot ^ { 2 } \alpha - \cot ^ { 2 } \alpha \cos ^ { 2 } \alpha$
A)​ $\cos ^ { 2 } \alpha$
B)​ $\sin ^ { 2 } \left( \frac { \pi } { 2 } - \alpha \right)$
C)​ $1 - \sin ^ { 2 } \alpha$
D)​ $\cot ^ { 2 } \alpha$
E)​ $\frac { 1 } { \sec ^ { 2 } \alpha }$

Quizplus · Accepted Answer

The Answer of Factor;then use fundamental identities to simplify the expression below and determine which of the following is not equivalent.​ $\cot ^ { 2 } \alpha - \cot ^ { 2 } \alpha \cos ^ { 2 } \alpha$
A)​ $\cos ^ { 2 } \alpha$
B)​ $\sin ^ { 2 } \left( \frac { \pi } { 2 } - \alpha \right)$
C)​ $1 - \sin ^ { 2 } \alpha$
D)​ $\cot ^ { 2 } \alpha$
E)​ $\frac { 1 } { \sec ^ { 2 } \alpha }$

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