trigonometry

Related Questions

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

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• $\sin 36{}^\circ \sin 72{}^\circ \sin 108{}^\circ \sin 144{}^\circ =$

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• In any triangle ABC ,${{\sin }^{2}}\frac{A}{2}+{{\sin }^{2}}\frac{B}{2}+{{\sin }^{2}}\frac{C}{2}$ is equal to

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• If $\cos (A-B)=\frac{3}{5}$ and $\tan A\tan B=2,$ then

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• The period of the function $\sin \left( \frac{2x}{3} \right)+\sin \left( \frac{3x}{2} \right)$ is

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