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Apply fraction cross-multiplication
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$\left(1-\cos\left(x\right)\right)\left(1+\cos\left(x\right)\right)=x\sin\left(x\right)^2$
Learn how to solve problems step by step online. Solve the rational equation (1-cos(x))/sin(x)=(sin(x)x)/(1+cos(x)). Apply fraction cross-multiplication. Multiplying polynomials 1-\cos\left(x\right) and 1+\cos\left(x\right). Multiply the single term \cos\left(x\right) by each term of the polynomial \left(1-\cos\left(x\right)\right). Cancel like terms -\cos\left(x\right) and \cos\left(x\right).