Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of multiple and sub-multiple angles
EasyIf $\cos 3\theta = \alpha \cos \theta + \beta \cos^3 \theta$,then $(\alpha, \beta) = $
- A$(3, 4)$
- B$(4, 3)$
- C$(-3, 4)$
- D$(3, -4)$
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Similar Questions
$96 \cos \frac{\pi}{33} \cos \frac{2 \pi}{33} \cos \frac{4 \pi}{33} \cos \frac{8 \pi}{33} \cos \frac{16 \pi}{33}$ is equal to $......$.
$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = $
Easy
View SolutionLet $n$ be an odd integer. If $\sin n\theta = \sum\limits_{r = 0}^n {{b_r}{{\sin }^r}\theta } $ for every value of $\theta $,then
Medium
View SolutionIf $A = 580^\circ$,then which one of the following is true?
If $\cos \theta = \frac{-3}{5}$ and $\theta$ does not lie in the second quadrant,then $\tan \frac{\theta}{2} = $
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