trigonometry

Related Questions

• $2{{\cos }^{2}}\theta -2{{\sin }^{2}}\theta =1$,then $\theta =$

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• $\frac{\sqrt{2}-\sin \alpha -\cos \alpha }{\sin \alpha -\cos \alpha }=$

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• The value of ${{e}^{{{\log }_{10}}\tan 1{}^\circ +{{\log }_{10}}\tan 2{}^\circ +{{\log }_{10}}\tan 3{}^\circ +...........+{{\log }_{10}}\tan 89{}^\circ }}$ is

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• Which is true in the following

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• If $\cos 2\theta +3\cos \theta =0$, then the general value of $\theta $ is

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