trigonometry

Related Questions

• In a$\Delta ABC,$ if $b=20,c=21$ and $\sin A=3/5$ , then $a=$

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• The angle of elevation of the top of a tower from the top of a house is 60° and the angle of depression of its base is 30°. If the horizontal distance between the house and the tower be 12 m, then the height of the tower is

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• The value of $\tan 7\frac{1}{2}{}^\circ $ is equal to

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• If $\sin 2\theta +\sin 2\varphi =1/2$ and $\cos 2\theta +\cos 2\varphi =3/2$, then ${{\cos }^{2}}(\theta -\varphi )=$

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• The angles of a triangle are in the ratio $1:3:5$ , then the greatest angle is

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