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Multiply $2$ times $2$
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$4\sin\left(x\right)\cos\left(x\right)$
Learn how to solve simplify trigonometric expressions problems step by step online. Simplify the trigonometric expression 2sin(x)*2cos(x). Multiply 2 times 2. Simplify 4\sin\left(x\right)\cos\left(x\right) using the trigonometric identity: \sin(2x)=2\sin(x)\cos(x). Apply the trigonometric identity: \sin\left(\theta \right)=\frac{\tan\left(\theta \right)}{\sqrt{1+\tan\left(\theta \right)^2}}, where x=2x.