# How do you graph # r=4/(1-costheta)#?

##### 1 Answer

This is the polar equation of the parabola with vertex at

#### Explanation:

The equation is obtained from the definition of the parabola, 'the

distance from the focus = the distance from the directrix, referred

to the focus as pole r = 0 and the focus-to-vertex axis of the

parabola as the initial line,

The standard form is

Here, the initial line is reversed to make it

After converting to Cartesian frame as

parabola is drawn, using Socratic graphic facility. The focus is at O.

See the directrix x + 4 = 0. .

graph{((x^2+y^2)^0.5-x-4)(x+4)=0}#