`cot(arctan(x))` Write an algebraic expression that is equivalent to the given expression. (Hint: Sketch a right triangle.)

Textbook Question

Chapter 4, 4.7 - Problem 65 - Precalculus (3rd Edition, Ron Larson).
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balajia | College Teacher | (Level 1) eNoter

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`tan^-1(x)=cot^-1(1/x)`

`cot(tan^-1(x))=cot(cot^-1(1/x))=1/x`

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