Find the value of: `cot(tan^(-1)a+cot^(-1)a)`

Explanation

To find the value of \( \cot(\tan^{-1} a + \cot^{-1} a) \), we can follow these steps:

### Step 1: Use the identity for the sum of inverse trigonometric functions
We know that:
\[ \tan^{-1} x + \cot^{-1} x = \frac{\pi}{2} \]
for any \( x \). In our case, we have \( x = a \).
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