NIELIT 2018-29

Question

Using Green’s theorem in plane, evaluate $\int_c (2x-y) dx + (x+y)dy$, where $c$ is the circle $x^2+y^2=4$ in the plane:

• A. $2 \pi$
• B. $4 \pi$
• C. $-4 \pi$
• D. $8 \pi$

Answer 1

option D