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Product-to-Sum Identity for Cosine
$$\cos A\cos B=\frac{1}{2}[\cos(A-B)+\cos(A+B)]$$
Usage
- Used to simplify products of cosine functions before integration.
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Product-to-Sum Identity for Cosine
$$\cos A\cos B=\frac{1}{2}[\cos(A-B)+\cos(A+B)]$$
Usage
- Used to simplify products of cosine functions before integration.
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