trigonometry

Related Questions

• If $\cos \theta =-\frac{1}{\sqrt{2}}$and $\tan \theta =1$, then the general value of $\theta $is

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• In$\Delta ABC,$ if $\cos A+\cos C=4{{\sin }^{2}}\frac{1}{2}B,$ then $a,b,c$ are in

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• In a triangle $ABC$ if $2{{a}^{2}}{{b}^{2}}+2{{b}^{2}}{{c}^{2}}=$ ${{a}^{4}}+{{b}^{4}}+{{c}^{4}}$ , then angle B is equal to

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• The solution of the equation $4{{\cos }^{2}}x+6$${{\sin }^{2}}x=5$

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• $\sin 36{}^\circ \sin 72{}^\circ \sin 108{}^\circ \sin 144{}^\circ =$

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