AM-1903

Product rule

A Math · Secondary 4 · Easy · Product rule

Differentiate

y = \dfrac{1}{4}x\sin 4x

with respect to

x

.

$\dfrac{1}{4}\sin 4x + x\cos 4x$
$\dfrac{1}{4}\sin 4x + \dfrac{1}{4}x\cos 4x$
$\sin 4x + x\cos 4x$
$\dfrac{1}{4}\cos 4x + x\sin 4x$

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