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How do you evaluate $cos ({cos}^{- 1} (\frac{1}{7}))$ $cos(cos^-1(1/7))$ ?

1 Answer

A. S. Adikesavan

Jul 9, 2016

$\frac{1}{7}$ $1/7$

Explanation:

Use $cos ({cos}^{- 1} c)$ $cos (cos^(-1) c)$ = the operand c.

Here, $c = \frac{1}{7}$ $c = 1/7$ .

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