trigonometry

Related Questions

• $\sin \left( \frac{\pi }{10} \right)\sin \left( \frac{3\pi }{10} \right)=$

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• If $\sin \theta =\sqrt{3}\cos \theta ,-\pi <\theta <0$, then $\theta =$

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• If $\sin {{\theta }_{1}}+\sin {{\theta }_{2}}+\sin {{\theta }_{3}}=3,$then $\cos {{\theta }_{1}}+\cos {{\theta }_{2}}+\cos {{\theta }_{3}}=$

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• If $\Delta ={{a}^{2}}-{{(b-c)}^{2}}$ , where $\Delta $ is the area of triangle $ABC$ , then tan A is equal to

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• If $\tan x+\tan \left( \frac{\pi }{3}+x \right)+\tan \left( \frac{2\pi }{3}+x \right)=3,$ then

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