# The general form for a limacon is #r=a+bcostheta# or #r=a+bsintheta#. When will a limacon have a dimple?

##### 1 Answer

Apr 8, 2018

Please see below.

#### Explanation:

Observe that we can write

Hence, there is not much of a difference and either can represent a limacon. However, general form used is

If the equation is

Limacon will have a dimple if

**Additional Information** - Limacon will have inner loop if