Math Help - closed integration

1. closed integration

evaluate

i have used directional derivate of f and used the fundamental theorem of line integrals

is it right

2. Re: closed integration

Hey prasum.

Show us your complete working out and your final answer so we can make comments.

3. Re: closed integration

use \int f dr = \int f(c(t))c'(t) dt where c is the parametric representation of the curve you are integrating over. So in this case $c(t) = <\sqrt(1-t^2), t>$