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Reduce $\sin\left(x\right)\cos\left(2x\right)$ by applying trigonometric identities
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$\int\frac{\sin\left(3x\right)+\sin\left(-x\right)}{2}dx$
Learn how to solve trigonometric integrals problems step by step online. Solve the trigonometric integral int(sin(x)cos(2x))dx. Reduce \sin\left(x\right)\cos\left(2x\right) by applying trigonometric identities. Take the constant \frac{1}{2} out of the integral. Simplify the expression inside the integral. The integral \frac{1}{2}\int\sin\left(3x\right)dx results in: -\frac{1}{6}\cos\left(3x\right).