trigonometry

Related Questions

• 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 $A+B+C={{270}^{o}},$ then $\cos \,2A+\cos 2B+\cos 2C+4\sin A\,\sin B\,\sin C=$

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• If a, b, c are the sides and A, B, C are the angles of a triangle $ABC$ , then $\tan \left( \frac{A}{2} \right)$ is equal to

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• $2{{\cos }^{2}}\theta -2{{\sin }^{2}}\theta =1$,then $\theta =$

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• The upper part of a tree broken over by the wind makes an angle of 30° with the ground and the distance from the root to the point where the top of the tree touches the ground is 10 m; what was the height of the tree

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