trigonometry

Related Questions

• In a $\Delta ABC$ , if $2s=a+b+c$ and $(s-b)(s-c)=$ $x{{\sin }^{2}}\frac{A}{2},$ then $x =$

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• In a $\Delta ABC,\ {{r}_{1}} < {{r}_{2}} < {{r}_{3}},$then

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• If the sides of triangle are 13, 14, 15, then the radius of its incircle is

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• If $x+y+z={{180}^{o}},$ then $\cos 2x+\cos 2y-\cos 2z$ is equal to

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• $\frac{\tan A+\sec A-1}{\tan A-\sec A+1}=$

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