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Multiply $13$ times $\pi $
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$derivdef\left(\frac{\tan\left(\frac{13\pi }{18}\right)+\tan\left(\frac{5\pi }{18}\right)}{1-\tan\left(\frac{40.8407045}{18}\right)\tan\left(\frac{5\pi }{18}\right)}\right)$
Learn how to solve definition of derivative problems step by step online. Find the derivative of (tan((13*pi)/18)+tan((5*pi)/18))/(1-tan((13*pi)/18)tan((5*pi)/18)) using the definition. Multiply 13 times \pi . Multiply 5 times \pi . Multiply 13 times \pi . Multiply 5 times \pi .