# How do you solve and find the value of cos(cos^-1(2/9))?

Feb 7, 2017

#### Answer:

$0.222222222$ or $\frac{2}{9}$

#### Explanation:

$\cos \left({\cos}^{-} 1 \left(\frac{2}{9}\right)\right)$

:.=cos(arccos(0.222222222)

$\therefore = \cos \left(77.16041159\right) \rightarrow$ decimals of a degreerarr77°09'37.48''

$\therefore = 0.222222222 \rightarrow \frac{2}{9}$