Write the Following as an Algebraic Expression in U, U $\tan \left( \operatorname { arcsec } \frac { \sqrt { \mathrm { u } ^ { 2 } + 9 } } { \mathrm { u } } \right)$

Write the following as an algebraic expression in u, u > 0.
- $\tan \left( \operatorname { arcsec } \frac { \sqrt { \mathrm { u } ^ { 2 } + 9 } } { \mathrm { u } } \right)$

A) $\frac { \sqrt { u ^ { 2 } + 3 } } { u ^ { 2 } + 3 }$
B) $3 u$
C) $\frac { 3 } { \mathrm { u } }$
D) $\frac { u \sqrt { u ^ { 2 } + 9 } } { u ^ { 2 } + 9 }$

Correct Answer:

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