Find the value of `2cos^(-1)3/(sqrt(13))+cot^(-1)(16)/(63)+1/2cos^(-1)7/(25)`

Explanation

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

\[ E = 2 \cos^{-1}\left(\frac{3}{\sqrt{13}}\right) + \cot^{-1}\left(\frac{16}{63}\right) + \frac{1}{2} \cos^{-1}\left(\frac{7}{25}\right) \]

### Step 1: Simplifying \(2 \cos^{-1}\left(\frac{3}{\sqrt{13}}\right)\)

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