trigonometry

Related Questions

• If $A={{\cos }^{2}}\theta +{{\sin }^{4}}\theta ,$ then for all values of $\theta$

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• If $\cos A=\cos B\,\,\cos C$and $A+B+C=\pi ,$ then the value of $\cot \,B\,\cot \,C$ is

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• $ABCD$ is a rectangular field. A vertical lamp post of height 12m stands at the corner A. If the angle of elevation of its top from B is ${{60}^{o}}$ and from C is ${{45}^{o}}$, then the area of the field is

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• If $\tan \theta +\sec \theta ={{e}^{x}},$then $\cos \theta $ equals

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• $\tan 75{}^\circ -\cot 75{}^\circ =$

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