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If f(x) is continuous at x=a, where f(x...

If `f(x)` is continuous at `x=a`, where `f(x)=(sin (a+x)+sin(a-x)-2 sin a)/(x sin x)", for " x!=a`, then `f(a)=`

A

`2/a (cosa-1)`

B

`1/a (cos a-1)`

C

`1/a (1-cosa)`

D

None of these

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The correct Answer is:
A
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