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If y=1costheta+2cos2theta+3cos3theta++99...

If `y=1costheta+2cos2theta+3cos3theta++99 cos 99theta` , the maximum value of `y` is `5490` b. `4950` c. `9450` d. `oo`

A

5490

B

4950

C

9450

D

`oo`

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