trigonometry

Related Questions

• In $\Delta ABC,\frac{\sin B}{\sin (A+B)}=$

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• $\cos 1{}^\circ +\cos 2{}^\circ +\cos 3{}^\circ +.....+\cos 180{}^\circ =$

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• If the line segment joining the points $A(a,\,b)$ and $B(c,\,d)$ subtends an angle $\theta $ at the origin, then $\cos \theta $ is equal to

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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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• In $\Delta ABC,$ if ${{\sin }^{2}}\frac{A}{2},{{\sin }^{2}}\frac{B}{2},{{\sin }^{2}}\frac{C}{2}$ be in H. P. then a, b, c will be in

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