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Rewrite the trigonometric expression $\cos\left(4x\right)\cos\left(6x\right)$ inside the integral
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$\int\frac{\cos\left(10x\right)+\cos\left(-2x\right)}{2}dx$
Learn how to solve problems step by step online. Solve the trigonometric integral int(cos(4x)cos(6x))dx. Rewrite the trigonometric expression \cos\left(4x\right)\cos\left(6x\right) inside the integral. Take the constant \frac{1}{2} out of the integral. Simplify the expression inside the integral. The integral \frac{1}{2}\int\cos\left(10x\right)dx results in: \frac{1}{20}\sin\left(10x\right).