trigonometry

Related Questions

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

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• If the sides of a triangle are in ratio 3 : 7 : 8, then R : r is equal to

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• Two men are on the opposite side of a tower. They measure the angles of elevation of the top of the tower 45° and 30° respectively. If the height of the tower is 40 m, find the distance between the men

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• The value of ${{\cos }^{2}}\frac{\pi }{12}+{{\cos }^{2}}\frac{\pi }{4}+{{\cos }^{2}}\frac{5\pi }{12}$ is

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• If $b\sin \alpha =a\sin (\alpha +2\beta ),$ then $\frac{a+b}{a-b}=$

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