trigonometry

Related Questions

• If $\tan \theta =\frac{-4}{3},$then$\sin \theta =$

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• $\cos \frac{\pi }{5}\cos \frac{2\pi }{5}\cos \frac{4\pi }{5}\cos \frac{8\pi }{5}=$

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• If $m\tan (\theta -30{}^\circ )=n\tan (\theta +120{}^\circ ),$ then $\frac{m+n}{m-n}=$

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• If $x=\sec \,\varphi -\tan \varphi ,y=\text{cosec}\varphi +\cot \varphi ,$then

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• In $\Delta ABC,$ $1-\tan \frac{A}{2}\tan \frac{B}{2}=$

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