trigonometry

Related Questions

• If $\alpha $ is a root of $25{{\cos }^{2}}\theta +5\cos \theta -12=0$, $\pi /2<\alpha <\pi $, then $\sin 2\alpha $is equal to

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

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• If $\tan \alpha =\frac{1}{7}$and $\sin \beta =\frac{1}{\sqrt{10}}\left( 0<\alpha ,\,\beta <\frac{\pi }{2} \right)$, then $2\beta $is equal to

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• If $\cos A\sin \left( A-\frac{\pi }{6} \right)$is maximum, then the value of A is equal to

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

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