Question

$cos^{ - 1} ( \cos( \frac{4\pi}{3} ))$


​

Answer 1

The range of cosθ is [0, π]

So, its value will be: $cos^-^1(cos (2\pi - \frac{4\pi }{3} ))$

= $cos^-^1(cos(\frac{2\pi }{3} ))$ = $\frac{2\pi}{3}$

please mark me brainliest