trigonometry

Related Questions

• The value of $\frac{\tan {{70}^{o}}-\tan {{20}^{o}}}{\tan {{50}^{o}}}=$

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• The area of a $\Delta ABC$ is equal to

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• If $\tan \frac{\theta }{2}=t,$then $\frac{1-{{t}^{2}}}{1+{{t}^{2}}}$is equal to

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• If the sides of a triangle are $3,\ 5,\ 7,$ then

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• The most general value of $\theta $satisfying the equations $\tan \theta =-1$ and $\cos \theta =\frac{1}{\sqrt{2}}$is

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