trigonometry

Related Questions

• If $\theta $is an acute angle and $\sin \frac{\theta }{2}=\sqrt{\frac{x-1}{2x}}$, then $\tan \theta $ is equal to

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• If $\sin \theta =\frac{12}{13},(0<\theta <\frac{\pi }{2})$ and $\cos \varphi =-\frac{3}{5},\left( \pi <\varphi <\frac{3\pi }{2} \right)$. Then $\sin (\theta +\varphi )$will be

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• A tower subtends an angle of 30° at a point distant d from the foot of the tower and on the same level as the foot of the tower. At a second point h vertically above the first, the depression of the foot of the tower is 60°. The height of the tower is

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• In a triangle $ABC$, if $b=2,\,B=30{}^\circ $then the area of circumcircle of triangle ABC in square units is

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• In $\Delta ABC$ , if $\tan \frac{A}{2}\tan \frac{C}{2}=\frac{1}{2},$ then $a,b,c$ are in

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