Strophoid The curve given by the parametric equations
is called a strophoid.
(a) Find a rectangular equation of the strophoid.
(b) Find a polar equation of the strophoid.
(c) Sketch a graph of the strophoid.
(d) Find the equations of the two tangent lines at the origin.
(e) Find the points on the graph at which the tangent lines are horizontal.
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Calculus of a Single Variable
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