trigonometry

Related Questions

• In $\Delta ABC,$ $1-\tan \frac{A}{2}\tan \frac{B}{2}=$

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• In a $\Delta ABC$ , $a=5,b=4$ and $\cos (A-B)=\frac{31}{32}$ , then side c is equal to

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• For $A=133{}^\circ ,\ 2\cos \frac{A}{2}$is equal to

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• If $(2\cos x-1)(3+2\cos x)=0,\,0\le x\le 2\pi $, then $x=$

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• At a point on the ground the angle of elevation of a tower is such that its cotangent is 3/5. On walking 32 metres towards the tower the cotangent of the angle of elevation is 2/5. The height of the tower is

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