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Reduce $\sin\left(x\right)\cos\left(2x\right)$ by applying trigonometric identities
Learn how to solve trigonometric integrals problems step by step online.
$\int\frac{\sin\left(3x\right)+\sin\left(-x\right)}{2}dx$
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. We can solve the integral \int\sin\left(3x\right)dx by applying integration by substitution method (also called U-Substitution). First, we must identify a section within the integral with a new variable (let's call it u), which when substituted makes the integral easier. We see that 3x it's a good candidate for substitution. Let's define a variable u and assign it to the choosen part.