Find an Algebraic Expression Equivalent to the Given Expression $\sin ( \arctan u )$

question 218

Multiple Choice

Find an algebraic expression equivalent to the given expression.
- $\sin ( \arctan u )$

• A) \(\frac { \sqrt { \mathrm { u } ^ { 2 } - 1 } } { \mathrm { u } }\)
• B) \(\frac { \mathrm { u } \sqrt { \mathrm { u } ^ { 2 } + 1 } } { \mathrm { u } ^ { 2 } + 1 }\)
• C) \(\sqrt { u ^ { 2 } + 1 }\)
• D) \(\sqrt { \mathrm { u } ^ { 2 } - 1 }\)

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