If cos 3 theta = alpha cos theta + beta ...

If `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)`

A

`(3,4)`

B

`(4,3)`

C

`(-3,4)`

D

`3,-4)`

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The correct Answer is:

C

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