trigonometry

Related Questions

• If $\sec \theta +\tan \theta =p,$then $\tan \theta $is equal to

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• If $\sin A+\sin 2A=x$ and $\cos A+\cos 2A=y,$ then $({{x}^{2}}+{{y}^{2}})({{x}^{2}}+{{y}^{2}}-3)=$

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• If$\frac{2\sin \alpha }{\{1+\cos \alpha +\sin \alpha \}}=y,$then $\frac{\{1-\cos \alpha +\sin \alpha \}}{1+\sin \alpha }=$

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• $\frac{\cos 12{}^\circ -\sin 12{}^\circ }{\cos 12{}^\circ +\sin 12{}^\circ }+\frac{\sin 147{}^\circ }{\cos 147{}^\circ }=$

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• The angle of elevation of the top of a tower at point on the ground is 30°. If on walking 20 metres toward the tower, the angle of elevation become 60°, then the height of the tower is

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