trigonometry

Related Questions

• Let D be the middle point of the side BC of a triangle ABC. If the triangle ADC is equilateral, then ${{a}^{2}}:{{b}^{2}}:{{c}^{2}}$ is equal to

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• If $4{{\sin }^{2}}\theta +2(\sqrt{3}+1)\cos \theta =4+\sqrt{3}$, then the general value of $\theta $is

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• If $\tan \theta =\frac{20}{21}$, $\cos \theta$ will be

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• $2{{\sin }^{2}}x+{{\sin }^{2}}2x=2,\,-\pi <x<\pi ,$then $x=$

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• If A, B, C are acute positive angles such that $A+B+C=\pi $ and $\cot A\,\cot \,B\,\cot \,C=K,$ then

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