Write the Trigonometric Expression as an Algebraic Expression in U $\cos \left( \tan ^ { - 1 } u \right)$

question 25

Multiple Choice

Write the trigonometric expression as an algebraic expression in u.
- $\cos \left( \tan ^ { - 1 } u \right)$

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

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