trigonometry

Related Questions

• In a $\Delta ABC$ , $a,\ b,\ A$ are given and ${{c}_{1}},\ {{c}_{2}}$ are two values of the third side c. The sum of the areas of two triangles with sides $a,\ b,\ {{c}_{1}}$ and $a,b,\ {{c}_{2}}$ is

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• If angle $\theta $ be divided into two parts such that the tangent of one part is $k$ times the tangent of the other and $\varphi $ is their difference, then $\sin \theta =$

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• If a triangle $PQR$ , $\sin P,\ \sin Q,\ \sin R$ are in A.P., then

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• The set of values of x for which the expression $\frac{\tan 3x-\tan 2x}{1+\tan 3x\tan 2x}=1$, is

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• Two pillars of equal height stand on either side of a roadway which is 60 metres wide. At a point in the roadway between the pillars, the elevation of the top of pillars are 60° and 30°. The height of the pillars is

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