Find the value of the following trigonometric functions:`cot(-(15pi)/4)`

Explanation

To find the value of \( \cot\left(-\frac{15\pi}{4}\right) \), we can follow these steps:

### Step 1: Use the cotangent identity for negative angles
We know that:
\[ \cot(-\theta) = -\cot(\theta) \]
Applying this identity, we have:
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