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Let f(x) = (1-cos4x)/x^2, g(x) sqrtx/(s...

Let `f(x) = (1-cos4x)/x^2, g(x) sqrtx/(sqrt(16+sqrtx)-4)` and
`phi(x) = {(f(x),x lt 0),(a, x = 0),(g(x), x gt ):}`
Answer the following question based on above passage :
`lim_(x rarr 0)` f(x) is equal to

A

1/2

B

2

C

1/8

D

8

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The correct Answer is:
D
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