trigonometry

Related Questions

• If $\sin A=\sin B$and $\cos A=\cos B,$then

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• If $2\tan A=3\tan B,$then $\frac{\sin 2B}{5-\cos 2B}$is equal to

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• $\sin 50{}^\circ -\sin 70{}^\circ +\sin 10{}^\circ =$

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

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• In $\Delta ABC,\left( \cot \frac{A}{2}+\cot \frac{B}{2} \right)\,\left( a{{\sin }^{2}}\frac{B}{2}+b{{\sin }^{2}}\frac{A}{2} \right)$ =

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