NLineIntegrate
NLineIntegrate[f,{x,y,…}∈curve] computes the numerical scalar line integral of the function f[x,y,…] over the curve.
NLineIntegrate[{p,q,…},{x,y,…}∈curve] computes the numerical vector line integral of the vector function {p[x,y,…],q[x,y,…],…}.
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