Trigonometry
Learn everything from Trigonometry, then test your knowledge on 75+ quiz questions
How this Trigonometry course is set up to make complicated math easy:
This approximately 50lesson course includes video and text explanations of everything from Trigonometry, and it includes more than 75 quiz questions (with solutions!) to help you test your understanding along the way. Trigonometry is organized into the following sections:
 Angles and their measure
 Six circular functions
 The law of sines and law of cosines
 The unit circle
 Graphing the trig functions
 Trig identities
And here’s what you get inside of every lesson:
Videos: Watch over my shoulder as I solve problems for every single math issue you’ll encounter in class. We start from the beginning... I explain the problem setup and why I set it up that way, the steps I take and why I take them, how to work through the yucky, fuzzy middle parts, and how to simplify the answer when you get it.
Notes: The notes section of each lesson is where you find the most important things to remember. It’s like Cliff Notes for books, but for math. Everything you need to know to pass your class and nothing you don’t.
Quizzes: When you think you’ve got a good grasp on a topic within a course, you can test your knowledge by taking one of our quizzes. If you pass, wonderful. If not, you can review the videos and notes again or ask me for help in the Q&A section.
Here's what some of my Trigonometry students have told me:
"Krista's courses are the absolute best you can find online, as far as I'm concerned. I feel like I am actually learning something from them!"  Jon K.
“The Instructor has an excellent command of the subject material and a great way of presenting it. In addition to that, she has a very pleasant voice that keeps you attentive.”  Robert S.
“This is an excellent course to become more familiar with trigonometric equations. The step by step instruction is very is to follow. I found it very helpful to follow along with solving the problems on paper to solidify the learning experience.”  David M.
“Krista explains everything in "simplest terms" so even if you haven't worked with this stuff for a while, she makes it totally easy to get back into the swing of it all. Thanks for (another) excellent course!”  Paul L.
Your Instructor
Math class was always so frustrating.
I’d go to a class, spend hours on homework, and three days later have an “Ahha!” moment about how the problems worked that could have slashed my homework time in half.
I’d think, “WHY didn’t my teacher just tell me this in the first place?!”
So I started tutoring to keep others out of that aggravating, timesucking cycle. Since then, I’ve recorded tons of videos and written out cheatsheet style notes and formula sheets to help every math student—from basic middle school classes to advanced college calculus—figure out what’s going on, understand the important concepts, and pass their classes, once and for all.
Course Path

Previewcomplementary and supplementary angles (4:00)

Previewsketching angles in standard position (10:14)

Previewquadrant of the angle (8:19)

Startconverting between degrees and dms (6:56)

Startfinding coterminal angles (23:19)

Startfunctions of negative angles

Startconverting between degrees and radians (8:18)

Startoriented arc for a real number (5:41)

Startarea of a circular sector (3:51)

Startlinear and angular velocity

Startfind the value or say where it's undefined (8:25)

Startfind all six trig functions given the quadrant of the angle (12:04)

Startfind all six trig functions at the coordinate point (7:37)

Startfind all six trig functions using reciprocal identities (5:27)

Startangle of depression and elevation (4:23)

Startproving the trig equation (5:37)

Startproving the trig equation with pythagorean identities (5:49)