# How do you graph #r=-8cos2theta#?

##### 1 Answer

Jul 30, 2018

See 8-like graph and details.

#### Explanation:

No pixels for

in two periods

Use

0 <= r = sqrt ( x^2 + y^2 ) and ( x, y ) = r ( cos theta, sin theta )# d

convert to

The Socratic 8-like graph is immediate.

graph{ ( x^2 + y^2 )^ 1.5 + 8 (x^2 - y^2 ) = 0[ -18 18 -9 9 ]}