Prove that : `sqrt((1-cos^(2)theta)sec^(2)theta)=tantheta`

Explanation

To prove that \(\sqrt{(1 - \cos^2 \theta) \sec^2 \theta} = \tan \theta\), we will start with the left-hand side and simplify it step by step.

### Step-by-Step Solution:

1. **Start with the Left-Hand Side:**
\[ \text{LHS} = \sqrt{(1 - \cos^2 \theta) \sec^2 \theta} \]
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