Find an Algebraic Expression Equivalent to the Given Expression $\cot \left( \arcsin \frac { \mathrm { u } } { \sqrt { \mathrm { u } ^ { 2 } + 5 } } \right)$

Find an algebraic expression equivalent to the given expression.
- $\cot \left( \arcsin \frac { \mathrm { u } } { \sqrt { \mathrm { u } ^ { 2 } + 5 } } \right)$

A) $\frac { \sqrt { u ^ { 2 } + 5 } } { 5 }$
B) $\frac { \sqrt { 5 } } { u }$
C) $\frac { \sqrt { 5 u ^ { 2 } + 25 } } { 5 }$
D) $\frac { \mathrm { u } \sqrt { \mathrm { u } ^ { 2 } + 5 } } { \mathrm { u } ^ { 2 } + 5 }$

Correct Answer:

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