Chapter 17, Problem 11RE

Two parameterizations Verify that ${\displaystyle {\oint }_C\left(x-2y+3z\right)ds}$ has the same value when C is given by r(t) = 〈2 cos t, 2 sin t, 0〉, for 0 ≤ t ≤ 2π, and by r(t) = 〈2 cos t², 2 sin t², 0〉, for $0\le t\le \sqrt{2\pi }$.