trigonometry

Related Questions

• If $\frac{\cos A}{\sin B\sin C}+\frac{\cos B}{\sin C\sin A}+\frac{\cos C}{\sin A\sin B}=$then $32\sin \left( \frac{A}{2} \right)\sin \left( \frac{5A}{2} \right)=$

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• If $A={{60}^{o}}$ , $a=5,b=4\sqrt{3}$ in $\Delta ABC$ , then $B =$

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• $\cos 20{}^\circ \cos 40{}^\circ \cos 80{}^\circ =$

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• In a triangle ABC, $a=5,b=7$ and $\sin A=\frac{3}{4}$ how many such triangles are possible

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• In any triangle ABC ,${{\sin }^{2}}\frac{A}{2}+{{\sin }^{2}}\frac{B}{2}+{{\sin }^{2}}\frac{C}{2}$ is equal to

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