Find an Algebraic Expression Equivalent to the Given Expression $\cos \left( \arctan \frac { \sqrt { 5 } } { u } \right)$

question 48

Multiple Choice

Find an algebraic expression equivalent to the given expression.
- $\cos \left( \arctan \frac { \sqrt { 5 } } { u } \right)$

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

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Effective Interest Rate

The real rate of interest earned or paid on an investment, loan, or other financial product adjusted for compounding over a given period.