Use Fundamental Identities to Simplify the Expression Below and Then $\sin \left( \frac { \pi } { 2 } - x \right) \csc x$

Multiple Choice

Use fundamental identities to simplify the expression below and then determine which of the following is not equivalent.
$\sin \left( \frac { \pi } { 2 } - x \right) \csc x$

A) -1
B) $\frac { \cos x } { \sin x }$
C) cot x
D) 1/ tan x
E) cos x csc x