# How do you graph #r= 5 cos theta #?

##### 1 Answer

Feb 23, 2016

Draw a circle with center at polar (5/2, 0 ) and radius 5/2.

#### Explanation:

r = D cos

initial line

The general equation of circles passing through the pole is

- Here, the diameter is D and the center is at
#( D/2, alpha )# .

The graph contrasts four such circles with D = 5 ( radius 2.5 ) and

graph{(x^2+y^2-5x)(x^2+y^2-5y)(x^2+y^2+5x)(x^2+y^2+5y)=0[-10.2 10.2 -5.6 5.6]}