What is the principal value of `cos^(-1)cos((2pi)/3)+sin^(-1)sin((2pi)/3)?`

Explanation

To solve the problem, we need to find the principal value of the expression:

\[ \cos^{-1}(\cos(2\pi/3)) + \sin^{-1}(\sin(2\pi/3)) \]

### Step-by-Step Solution:

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