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If alpha cos^ 3 theta + beta cos^4 thet...

If `alpha cos^ 3 theta + beta cos^4 theta = 16 cos^6 theta + 9 cos^2 theta` is an identity then-

A

`a=1, b=24`

B

`a=3, b=24`

C

`a=4, b=2`

D

`a=7, b=18`

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