What is the derivative of $sin(ax)$ ?

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Answer 1 · 2015-07-30T21:27:34

$acos(ax)$

We know $d/dx(sin(x))=cos(x)$ and $d/dx(f(g(x))=f'(g(x))*g'(x)$ (the Chain Rule).

Use these two rules now, with $f(x)=sin(x)$ and $g(x)=a x$ (where $a$ is a constant).

What is the derivative of sin(ax)sin(ax)?