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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• A balloon is observed simultaneously from three points A, B and C on a straight road directly under it. The angular elevation at B is twice and at C is thrice that of A. If the distance between A and B is 200 metres and the distance between B and C is 100 metres, then the height of balloon is given by

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• In a triangle $ABC$ , sin$A:\sin B$ : $\sin C=1:2:3$. If $b=4$ cm, the perimeter of the triangle is

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• If $\frac{\sin A-\sin C}{\cos C-\cos A}=\cot B,$ then A,B,C are in

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• The area of an isosceles triangle is $9c{{m}^{2}}$. If the equal sides are $6cm$ in length, the angle between them is

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