The Unit Circle explanations, examples, practice problems. Ready? Let's do this.
Right Triangle Review
Just because triangles aren't the be-all, end-all of trigonometry doesn't mean they aren't important. We'll need to know several facts about right triangles in order to use the unit circle. While...
Unit Circle
When you condense the idea of a circle down to its very essence, its most basic form—the ur-circle, or urcle if you will—you get the unit circle. It's a unit because it has a radius of 1.That c...
Solving Trigonometric Equations
When hunting mathematical abstractions, your strategy is key. (Or maybe your tactics; we can never keep the two straight.)If you want to catch a trigonometric expression, we use an angle as bait. W...
Trig Equations with Non-Standard Angles
It's almost graduation time here at Unit Circle U. We've mastered using the unit circle with the standard angles: and the axes. Now is a time of celebration, of reminiscing over our accomplishment...
In the Real World
This section has all been about calculating trigonometric functions and solving trigonometric equations. Trigonometry is a very practical branch of mathematics (if you're into that sort of thing).I...