I'm a bit confused as to how to solve this line integral:(adsbygoogle = window.adsbygoogle || []).push({});

Evaluate I = The integral of (x+y)dx from A (0,1) to B (0,-1) along the semi-circle

x^2 + y^2 = 1 for for x is equal to or greater than 0.

So far have have got:

if x^2 + y^2 = 1 then y= + SQRT of (1 - x^2)

which I believe boils down to : 2 times the integral of SQRT (1 - x^2) from 0 to 1.

I'm very confused how to finish this off and would appreciate any help.

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# Line Integral (where the path is not single valued)

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