trigonometry

Related Questions

• In a triangle $ABC$ , if $a=2,B={{60}^{o}}$ and $C={{75}^{o}}$ , then $b =$

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

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• If$\frac{2\sin \alpha }{\{1+\cos \alpha +\sin \alpha \}}=y,$then $\frac{\{1-\cos \alpha +\sin \alpha \}}{1+\sin \alpha }=$

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• Which is true in the following

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• $2\cos x-\cos 3x-\cos 5x=$

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