`cos^(3)x`

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To solve the integral of \( \cos^3 x \) with respect to \( x \), we can use the identity for \( \cos^3 x \) in terms of \( \cos 3x \). ### Step-by-step Solution: 1. **Use the identity for \( \cos^3 x \)**: We know that: \[ \cos^3 x = \frac{1}{4} \left( \cos 3x + 3 \cos x \right) ...
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