trigonometry

Related Questions

• If $\sin \theta +\sin \varphi =a$and $\cos \theta +\cos \varphi =b,$then $\tan \frac{\theta -\varphi }{2}$is equal to

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• If the sides of a triangle are in the ratio $2:\sqrt{6}:(\sqrt{3}+1)$ , then the largest angle of the triangle will be

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• If in a triangle the angles are in A. P. and $b:c=\sqrt{3}:\sqrt{2}$ , then $\angle A$ 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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• If $A$ lies in the second quadrant and $3\tan A+4=0,$ the value of $2\cot A-5\cos A+\sin A$is equal to

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