trigonometry

Related Questions

• In a $\Delta ABC,\,\,{{a}^{2}}\sin \,\,2C+{{c}^{2}}\sin 2A=$

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• $\cos \frac{\pi }{5}\cos \frac{2\pi }{5}\cos \frac{4\pi }{5}\cos \frac{8\pi }{5}=$

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• The value of $\theta $lying between 0 and $\pi /2$and satisfying the equation $\begin{vmatrix} {1 + {{\sin }^2}\theta }&{{{\cos }^2}\theta }&{4\sin 4\theta }\\ {{{\sin }^2}\theta }&{1 + {{\cos }^2}\theta }&{4\sin 4\theta }\\ {{{\sin }^2}\theta }&{{{\cos }^2}\theta }&{1 + 4\sin 4\theta } \end{vmatrix} =0$

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• ${{\tan }^{2}}\theta +{{\cot }^{2}}\theta $is

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• If $1+\cot \theta =\text{cosec}\theta $, then the general value of $\theta $ is

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