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cos^(3)110^(@)+cos^(3)10^(@)+cos^(3)130^...

`cos^(3)110^(@)+cos^(3)10^(@)+cos^(3)130^(@)=`

A

`(3)/(4)`

B

`(3)/(8)`

C

`(3sqrt(3))/(8)`

D

`(3sqrt(3))/(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
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