http://www.cramster.com/answers-dec-11/calculus/calc-problem_1848453.aspx?rec=0
calc three problem, if anyone can help that would be awesome...thanks

Question

anonymous · Answer

what is it , line integral?

anonymous · Answer

yes

anonymous · Answer

vectors fields and line integrals

anonymous · Answer

$$<\frac{-y}{x^2+y^2},\frac{x}{x^2+y^2}>$$

anonymous · Answer

plug in cos(t)for x and sin t for y

anonymous · Answer

$$<\frac{-sin(t)}{1},\frac{cos(t)}{1}>$$

anonymous · Answer

i dont understand how to calculate A and B

anonymous · Answer

i think i can get C from this point

anonymous · Answer

dot product it

$$\frac{-sin(t)}{1},\frac{cos(t)}{1}>.<cos(t),sin(t)>$$

and integrate for line integral

anonymous · Answer

as for dQ/dx

take derivative w.r.t  x of 
$$\frac{x}{x^2+y^2}$$

anonymous · Answer

alrighty ill try that out and see if it works, thanks

anonymous · Answer

anonymous · Answer

nice, its correct, thanks