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If f(x) is continuous at x=0, where f(x...

If `f(x)` is continuous at `x=0`, where `f(x)={:{((1-cos x)/(x)", for " x!=0),(k ", for" x = 0 ):}`, then `k=`

A

`1/2`

B

`(-1)/(2)`

C

`1/4`

D

0

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The correct Answer is:
D
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