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Multiply $3$ times $\pi $
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$7\cos\left(\frac{3\pi }{2}\right)+\sin\left(\frac{3\pi }{2}\right)i$
Learn how to solve simplify trigonometric expressions problems step by step online. Simplify the trigonometric expression 7cos((3*pi)/2)+isin((3*pi)/2). Multiply 3 times \pi . Multiply 3 times \pi . Divide 3\pi by 2. Divide 3\pi by 2.