Hi Guys,

I am having problems with the following question..

Evaluate dy(over)dx for y=7sin^6x

Here is where i am up to..

Let u = sinx > du(over)dx = cosx

y = 7u^6 > dy(over)du = 42u5

dy(over)dx = dy(over)du x du(over)dx = 42u^5x (cosx)

I now have to substitute U back?

Any help appreciated, thanks.