If the sum of all the solutions of the e...

If the sum of all the solutions of the equation
`8 cosx.(cos(pi/6+x)cos(pi/6-x)-1/2)=1` in `[0,pi]` is `k pi`
then k is equal to

A

(a) `(13)/(9)`

B

(b) `(8)/(9)`

C

(c) `(20)/(9)`

D

(d) `(2)/(3)`

Verified by Experts

The correct Answer is:

A

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