If `sinA+sin^2A=1,` then the value of `cos^2A+cos^4A` is 2 (b) 1 (c) -2 (d) 0

Explanation

To solve the equation \( \sin A + \sin^2 A = 1 \) and find the value of \( \cos^2 A + \cos^4 A \), we can follow these steps:

### Step 1: Rewrite the given equation
We start with the equation:
\[ \sin A + \sin^2 A = 1 \]

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