Express `1+ sin theta` as a prefect square.

Explanation

To express \( 1 + \sin \theta \) as a perfect square, we can follow these steps:

### Step 1: Recall the Pythagorean Identity
We know from trigonometry that:
\[ \sin^2 A + \cos^2 A = 1 \]
This means we can express \( 1 \) in terms of sine and cosine.
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