calc: Find dr/dx for r = sqrt(x sin(x))

[xc630]

Hi I would appreciate any help with this derivative need to find

Find dr/dx

r = SQRT ( xsinx)

I rewrote it as (x sin x)^1/2

And proceeded as follows:

1/2 (x Sin X) ^-1/2

I think this only part of the next step. I'm not sure what I need to do also. Would appreciate any help. thanks

 

[skeeter]

what do you know about the chain rule?

r = (xsinx)^1/2

dr/dx = (1/2)(xsinx)^-1/2(xcosx + sinx)

dr/dx = (xcosx + sinx)/[2(xsinx)^1/2]