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JAMB - Mathematics (2003 - No. 25)

If y = 3 sin(-4x), dy/dx is
12x cos (4x)
-12x cos (-4x)
-12 cos (-4x)
12 sin (-4x)

解释

y = 3 sin(-4x)
dy/dx = 3 x - 4 cos (-4x)
= -12 cos (-4x)

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