Originally Posted by

**psilver1** Usually I get that one problem a night that I just get completely locked up on and was hoping for an explanation on where I am going wrong. As always thanks for your help, ya'll have been a life saver. Problem below

s= Sqrt. (t^2 - cot*t + 2)^3 Find ds

so I am looking for the differential right? Since its a square root problem I believe I sould be taking diff and putting it in s'= Sqrt[(t^2- cot*t + 2)^3] '

That would go to Sqrt [(t^2 - cot*t + 2)^3'] * dt. Then my algerbra is kicking my butt. Why cant I pull out a (t^2-cot*t + 2)'Sqrt(t^2-cot*t+2)'(dt). then take thir deriv. This stuff kills me,