graphing
Polar graphing calculator in Graph Lab
Graph Lab plots polar equations like r = 2 cos(θ) with an optional polar grid—open the demo, then change the coefficient for roses and cardioids.
By UtilBloom · Published 2026-10-12 · Updated 2026-10-12
The problem
Precalculus polar chapters need r(θ) plots with a circular grid. Converting everything to Cartesian first slows homework and hides the polar structure.
How to plot polar curves
Enter r = 2 cos(θ) (LaTeX-style r=2\cos(\theta) works in Graph Lab). Enable polar grid and equal aspect so petals look correct. Open the polar demo.
When Desmos or parametric is better
Use Desmos if the class activity already ships polar scaffolds. Prefer parametric graphing when the worksheet gives x(t) and y(t) instead of r(θ).
FAQ
Does Graph Lab use radians by default?
Yes for polar sampling unless you change settings—match your homework’s angle mode.
How do I get a four-petal rose?
Try forms like r = a cos(2θ) or r = a sin(2θ) and adjust a; verify against your textbook identity table.
Can I share a polar graph without an account?
Yes—copy the URL hash from Graph Lab; recipients reopen the same expression list.
Where is the light Cartesian tool?
/math/graphing-calculator for y = f(x) only.