The Chain Rule

AP Calculus AB· difficulty 2/5

\dfrac{d}{dx}\cos(3x + 1) =

A
$3\cos(3x + 1)$
B
$-3\sin(3x + 1)$
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C
$-\sin(3x + 1)$
D
$3\sin(3x + 1)$

Explanation

-\sin(3x+1) \cdot 3 = -3\sin(3x+1)

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