trigonometry

Related Questions

• In a triangle ABC, $a:b:c=4:5:6$. The ratio of the radius of the circumcircle to that of the incircle is

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• If $\cos P=\frac{1}{7}$ and $\cos Q=\frac{13}{14},$ where P and Q both are acute angles. Then the value of $P-Q$ is

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• If $\pi <\alpha <\frac{3\pi }{2}$, then $\sqrt{\frac{1-\cos \alpha }{1+\cos \alpha }}+\sqrt{\frac{1+\cos \alpha }{1-\cos \alpha }}$=

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• If $\cos \theta +\sec \theta =\frac{5}{2}$, then the general value of $\theta $is

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• If $\cos (\theta -\alpha ),\ \cos \theta $and $\cos (\theta +\alpha )$are in H.P., then $\cos \theta \sec \frac{\alpha }{2}$is equal to

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