trigonometry

Related Questions

• $2{{\sin }^{2}}x+{{\sin }^{2}}2x=2,\,-\pi <x<\pi ,$then $x=$

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• If $\tan A=-\frac{1}{2}$and $\tan B=-\frac{1}{3},$then $A+B=$

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• In a $\Delta ABC,\ {{r}_{1}} < {{r}_{2}} < {{r}_{3}},$then

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• In $\Delta ABC,$ $\text{cosec }A(\sin B\cos C+\cos B\sin C)=$

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• If $\cos (\theta -\alpha ),\ \cos \theta $and $\cos (\theta +\alpha )$are in H.P., then $\cos \theta \sec \frac{\alpha }{2}$is equal to

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