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A difference of sines, (sin 4x - sin 2x)/x, tends to what at x = 0?
AEqual to 0
BEqual to 6
CEqual to 4
DEqual to 2
Answer & Solution
Correct answer: D. Equal to 2
The expression equals 4 (sin 4x / 4x) - 2 (sin 2x / 2x), which tends to 4 - 2 = 2.
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