If y 3 cos 4x frac dy dx equals - JAMB Mathematics 2009 Question
If y = 3 cos 4x, \(\frac{dy}{dx}\) equals
A
6 sin 8x
B
-24 sin 4x
C
12 sin 4x
D
-12 sin 4x
correct option: d
If y = 3 cos 4x, \(\frac{dy}{dx}\) equals
\(\frac{dy}{dx}\) = 3(4 - sin 4x)
= -12 sin 4x
\(\frac{dy}{dx}\) = 3(4 - sin 4x)
= -12 sin 4x
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