trigonometry

Related Questions

• If $\tan \theta =-\frac{1}{\sqrt{10}}$and $\theta $ lies in the fourth quadrant, then $\cos \theta =$

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• If $A={{60}^{o}}$ , $a=5,b=4\sqrt{3}$ in $\Delta ABC$ , then $B =$

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• If $\tan A=\frac{1-\cos B}{\sin B},$find$\tan 2A$in terms of $\tan B$ and show that

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• $\cos 20{}^\circ \cos 40{}^\circ \cos 80{}^\circ =$

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• In a triangle $\tan A+\tan B+\tan C=6$ and $\tan A\tan B=2,$then the values of $\tan A,\,\,\tan B$ and $\tan C$ are

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