Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of multiple and sub-multiple angles
Easy$\sqrt{2+\sqrt{2+2 \cos 4 \theta}} = $
- A$2 \cos \theta$
- B$\frac{\cos \theta}{2}$
- C$\frac{\cos \theta}{\sqrt{2}}$
- D$\sqrt{2} \cdot \cos \theta$
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If $\cos \theta = \frac{-3}{5}$ and $\pi < \theta < \frac{3 \pi}{2}$,then $\tan \left(\frac{\theta}{2}\right) = $
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View Solution$\cos \frac{\pi}{7} \cos \frac{2\pi}{7} \cos \frac{3\pi}{7} =$
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$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = $
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