If y = 3 sin(-4x), dy/dx is
A
12x cos (4x)
B
-12x cos (-4x)
C
-12 cos (-4x)
D
12 sin (-4x)
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
y = 3 sin(-4x)
dy/dx = 3 x - 4 cos (-4x)
= -12 cos (-4x)
Source: Myschool Past Questions Archive (Record #7838)