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$\int\left(\cos\left(x\right)+3\sin\left(x\right)\right)dx$
Learn how to solve integral calculus problems step by step online. Find the integral of r=cos(x)+3sin(x). Find the integral. Expand the integral \int\left(\cos\left(x\right)+3\sin\left(x\right)\right)dx into 2 integrals using the sum rule for integrals, to then solve each integral separately. The integral \int\cos\left(x\right)dx results in: \sin\left(x\right). The integral \int3\sin\left(x\right)dx results in: -3\cos\left(x\right).