trigonometry

Related Questions

• The value of $\sin {{47}^{o}}+\sin 61{}^\circ -\sin 11{}^\circ -\sin 25{}^\circ =$

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• If $\frac{\sin (x+y)}{\sin (x-y)}=\frac{a+b}{a-b},$then $\frac{\tan x}{\tan y}$ is equal to

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• If $3({{\sec }^{2}}\theta +{{\tan }^{2}}\theta )=5$, then the general value of $\theta $ is

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• In any triangle $ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=$

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• $\cos 1{}^\circ +\cos 2{}^\circ +\cos 3{}^\circ +.....+\cos 180{}^\circ =$

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