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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