Evaluate the line integral 2 + x2y ds where c is the upper half of the circle x2 + y2 = 1.
1 answer:
Parameterize <em>C</em> by
r(t) = 〈x(t), y(t)〉 = 〈cos(t), sin(t)〉
with 0 ≤ t ≤ <em>π</em>. Then the line integral is

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