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Let alpha and beta be the distinct roo...

Let ` alpha and beta ` be the distinct root of ` ax^(2) + bx + c=0 ` then` lim_(x to 0) (1- cos (ax^(2)+ bx+c))/((x-alpha)^(2))` is equal to

A

`-a^2/2 (alpha-beta)^2`

B

`1/2 (alpha-beta)^2`

C

`a^2/2 (alpha-beta)^2`

D

0

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The correct Answer is:
C
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