All guides
Pick the guide that matches your problem
How to use the graphing calculator
Plot y = f(x), read roots and intercepts straight off the screen, find where two curves cross, shade an inequality, and drive parameters with sliders. Includes transformations, asymptotes, domain and range.
How to graph polar equations
Meet r = f(θ) and the curves it draws: circles, cardioids, rose curves, limaçons, lemniscates and spirals. Covers negative radii, the petal counting rule, and converting between polar and rectangular form.
Every scientific calculator key explained
Trigonometry, logarithms, powers and roots, factorials, nPr and nCr, memory keys, and the difference between degrees and radians. This guide sits on the calculator page itself, so you can try each key as you read.
Not sure where to start
Which calculator does your question need?
Most of the time the answer comes down to one thing: do you need a number, or do you need a picture?
If your question ends in a single value, such as a sine, a logarithm or how many committees you can form from ten people, reach for the online scientific calculator. If your question is about shape, such as where a curve crosses the axis or where two lines meet, you want the free online graphing calculator and its step by step guide.
Polar is the odd one out, and the choice there is made by the geometry rather than by you. Anything built around a centre, such as a radar sweep, a spiral shell or a planetary orbit, is far simpler in r and θ than in x and y. When that is your situation, the polar graphing calculator and the guide to graphing polar equations are the right starting point.
| You want to | Use | Guide |
|---|---|---|
| Evaluate a trig value, log or factorial | Scientific | On the tool page |
| Plot a function and find its roots | Graphing | Graphing guide |
| Find where two curves intersect | Graphing | Graphing guide |
| Shade an inequality or draw a circle | Graphing | Graphing guide |
| Draw a cardioid, rose curve or spiral | Polar | Polar guide |
| Convert between polar and rectangular | Polar | Polar guide |
Reading is good. Trying is better.
Every guide is written next to a tool you can open in the same breath. Nothing to install, nothing to sign up for, no limits on what you can plot.