Let f be the function defined on [-pi,pi...

Let `f` be the function defined on `[-pi,pi]` given by `f(0)=9`
and `f(x)=sin((9x)/2)/sin(x/2)` for `x!=0`.
The value of `2/pi int_-pi^pif(x)dx` is

A

(a) `0`

B

(b) `2`

C

(c) `4`

D

(d) `6`

Verified by Experts

The correct Answer is:

C

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