trigonometry

Related Questions

• If $A+B+C=\pi ,$ then ${{\tan }^{2}}\frac{A}{2}+{{\tan }^{2}}\frac{B}{2}+$${{\tan }^{2}}\frac{C}{2}$ is always

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• The shadow of a tower is found to be 60 metre shorter when the sun’s altitude changes from ${{30}^{o}}$ to ${{60}^{o}}$. The height of the tower from the ground is approximately equal to

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• $\frac{\sqrt{2}-\sin \alpha -\cos \alpha }{\sin \alpha -\cos \alpha }=$

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• If $x=\sec \theta +\tan \theta ,$then $x+\frac{1}{x}=$

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• $\tan 1{}^\circ \tan 2{}^\circ \tan 3{}^\circ \tan 4{}^\circ ........\tan 89{}^\circ =$

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