Class 11MathematicsTrigonometric FunctionsTrigonometrical ratios of multiple and sub-multiple angles
EasyIf $\tan \theta = \frac{1}{3}$,then $\cos 2 \theta = $
- A$\frac{1}{4}$
- B$\frac{1}{10}$
- C$\frac{1}{5}$
- D$\frac{4}{5}$
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If $\cos \frac{\pi}{4} \cos \frac{\pi}{8} \cos \frac{\pi}{16} \cos \frac{\pi}{32} = 2^m \operatorname{cosec} \frac{\pi}{n}$,then $m+n=$
If $\tan \theta + \tan \left(\theta + \frac{\pi}{3}\right) + \tan \left(\theta + \frac{2\pi}{3}\right) = 3$,then which of the following is equal to $1$?
DifficultAP EAMCET 2008
View SolutionIf $3 \sin x + 4 \cos x = 5$,then $6 \tan \frac{x}{2} - 9 \tan^2 \frac{x}{2}$ is equal to
$\tan 3A \cdot \tan 2A \cdot \tan A = $
$\tan 3A - \tan 2A - \tan A = $
Easy
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