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Exercise

$cos\left(tan^{-1}\left(u\right)\right)$

Step-by-step Solution

1

Simplify $\cos\left(\arctan\left(u\right)\right)$ as $\frac{1}{\sqrt{u^2+1}}$

$\frac{1}{\sqrt{u^2+1}}$

Final answer to the exercise

$\frac{1}{\sqrt{u^2+1}}$

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Main Topic: Equivalent Expressions

Two algebraic expressions are equivalent if they stay equal to each other, for any values their variables can take.

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