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The quotient (1 - cos 4x)/x^2 approaches which value as x shrinks to 0?
AEqual to 4
BEqual to 8
CEqual to 16
DEqual to 2
Answer & Solution
Correct answer: B. Equal to 8
Using 1 - cos 4x = 2 sin^2 2x gives 2 x 4 (sin 2x / 2x)^2, which tends to 8.
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