trigonometry

Related Questions

• If $(1+\tan \theta )(1+\tan \varphi )=2$, then $\theta +\varphi $=

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• If ${{c}^{2}}={{a}^{2}}+{{b}^{2}}$ , then $4s(s-a)(s-b)(s-c)=$

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• A circular wire of radius $7\,cm$ is cut and bend again into an arc of a circle of radius $12cm$. The angle subtended by the arc at the centre is

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• $\cos A+\sin (270{}^\circ +A)-\sin (270{}^\circ -A)+\cos (180{}^\circ +A)=$

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• The roots of the equation $1-\cos \theta =\sin \theta .\sin \frac{\theta }{2}$ is

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