Class 11MathematicsTrigonometric FunctionsTrigonometrical 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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