Question #45c8c

1 Answer
May 15, 2017

-2cos(-2x)

Explanation:

I will assume you meant sin(-2x):

Use chain rule. First, take the derivative of sin(u) where u=-2x. But we'll plug that in later.:

(sin(u))'=cos(u)

Now, we have to find u'.

u'=-(-2x)'=-2:

Multiply the two together:

-2cos(u)

Now plug u back in:

-2cos(-2x)