trigonometry

Related Questions

• $1+\cos 2x+\cos 4x+\cos 6x=$

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• $\frac{\cos 12{}^\circ -\sin 12{}^\circ }{\cos 12{}^\circ +\sin 12{}^\circ }+\frac{\sin 147{}^\circ }{\cos 147{}^\circ }=$

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• The value of $\cos 12{}^\circ +\cos 84{}^\circ +\cos 156{}^\circ +\cos 132{}^\circ $ is

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• In a $\Delta ABC,\,\,\frac{\cos C+\cos A}{c+a}+\frac{\cos B}{b}$ is equal to

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• If $\tan (\pi \cos \theta )=\cot (\pi \sin \theta ),$then the value of $\cos \left( \theta -\frac{\pi }{4} \right)$=

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