trigonometry

Related Questions

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

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• If in a $\Delta ABC$ , $\cos 3A+\cos 3B+\cos 3C=1$ , then one angle must be exactly equal to

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• A man whose eye level is 1.5 metres above the ground observes the angle of elevation of a tower to be 60°. If the distance of the man from the tower be 10 meters, the height of the tower is

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• If$\cos 6\theta +\cos 4\theta +\cos 2\theta +1=0$, where $0<\theta <{{180}^{o}}$, then $\theta $ =

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

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