Question

What is a cardioid curve?

Answer 1

Please see below

Explanation:

Cardioid curve is some thing like a heart shaped figure (that is how the word 'cardio' has come). It is the locus of a point on the circumference of a circle that moves on another circle without slipping.

Mathematically it is given by the polar equation `r=a(1-costheta)`, at times also written as `r=2a(1-costheta)`,

It appears as shown below.