trigonometry

Related Questions

• If $\sin A+\sin 2A=x$ and $\cos A+\cos 2A=y,$ then $({{x}^{2}}+{{y}^{2}})({{x}^{2}}+{{y}^{2}}-3)=$

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• The solution of $3\tan (A-{{15}^{o}})=\tan (A+{{15}^{o}})$ is

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• In $\Delta ABC,$ if $a=16,b=24$ and $c=20,$ then $\cos \frac{B}{2}=$

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• If $\frac{\sin (x+y)}{\sin (x-y)}=\frac{a+b}{a-b},$then $\frac{\tan x}{\tan y}$ is equal to

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

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