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Definition of Circle

Find the valu...

Question

Find the value of ${cos}^{- 1} (cos \frac{5 π}{3})$

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Solution

$c o s^{- 1} (c o s x) = x$
$∴ c o s^{- 1} (c o s \frac{5 π}{3}) = \frac{5 π}{3}$
$= 5 \times \frac{180}{3} = 5 \times 60 = 300^{\circ}$

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