trigonometry

Related Questions

• The roots of the equation $1-\cos \theta =\sin \theta .\sin \frac{\theta }{2}$ is

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• In $\Delta ABC,\left( \cot \frac{A}{2}+\cot \frac{B}{2} \right)\,\left( a{{\sin }^{2}}\frac{B}{2}+b{{\sin }^{2}}\frac{A}{2} \right)$ =

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• The expression $(1+\tan x+{{\tan }^{2}}x)$ $(1-\cot x+{{\cot }^{2}}x)$ has the positive values for x, given by

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• If $\alpha $ is a root of $25{{\cos }^{2}}\theta +5\cos \theta -12=0$, $\pi /2<\alpha <\pi $, then $\sin 2\alpha $is equal to

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• If in a right angled triangle the hypotenuse is four times as long as the perpendicular drawn to it from opposite vertex, then one of its acute angle is

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