Question

principal value of cos-1(cos2π). ( here -1 showing cos inverse)​

Answer 1

Step-by-step explanation:

 principal value of cos-1(cos2π). ( here -1 showing cos inverse) -

Answer 2

Principal value of cos⁻¹(cos2π) is 0

Step-by-step explanation:

To find out:

The principal value of $\cos^{-1}(\cos 2\pi)$

Solution:

We know that range of $\cos^{-1}x$ is $[0,\pi]$

And, $\cos 2\pi=1$

Thus,

$\cos^{-1}\cos 2\pi$

$=\cos^{-1}(1)$

$=0$

Hope this answer is helpful.

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