Locate the width of the curved surface of the part above a ring of rose line...

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Locate the width of the curved surface of the part above a ring of rose line r=acos20 in xy plane of the upper half of spherical x^2+y^2+z^2=a>0. answer : a^2(T/2-1) Locate the width of the curved surface of the part above a ring of rose line r=acos20 in xy plane of the upper half of spherical x^2+y^2+z^2=a>0. answer : a^2(T/2-1)

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