Evaluate: `intcos^(5)xsin^(4)xdx`

Explanation

To evaluate the integral \( I = \int \cos^5 x \sin^4 x \, dx \), we will follow a systematic approach.

### Step 1: Rewrite the integral
We start by expressing the integral in a more manageable form:
\[ I = \int \cos^5 x \sin^4 x \, dx \]

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