#
Osculating Circle of Trochoid in Nephroid Family

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related animated gif files

egg

osculating circle of ellipse

osculating circle of parabola

osculating circle of nephroid

Osculating circle of the
complex curve (1)

Osculating circle of the
complex curve (2)

Osculating circle
of the cycloid

Osculating circle of the astroid

Osculating circle of the cardioid

Osculating circle of the deltoid

Osculating circle of the
trochoid