Thread: line integral very urgent please help

Find line integral F(x,y) .dr
where C is the curve given by
r(t)=(t^2 -2)i+((t-1)+t(t-2)cos(t))j 0<=t<=2

and
f(x,y) = (xy^2+2x)i+(x^2y +y+1)j

Originally Posted by bobby77

Find line integral F(x,y) .dr
where C is the curve given by
r(t)=(t^2 -2)i+((t-1)+t(t-2)cos(t))j 0<=t<=2

and
f(x,y) = (xy^2+2x)i+(x^2y +y+1)j

You need to know that:



so:


.

Then



which I trust you I can leave to you

(by the way the value of the integral is 2 )

RonL