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HOW BECOME A TRIGONOMETRY MASTER IS SET UP TO MAKE COMPLICATED MATH EASY
This 60lesson course includes video explanations of everything from Trigonometry and Precalculus. Become a Trigonometry Master is organized into the following sections:
HERE'S WHAT SOME STUDENTS OF BECOME A TRIGONOMETRY MASTER 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.
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Section 1: Getting started  

Lecture 1 
Welcome to Trigonometry!
Preview

00:34  
Section 2: Introduction to angles  
Lecture 2 
Complementary and supplementary angles
Preview

04:00  
Quiz 1 
Complementary and supplementary angles

2 questions  
Lecture 3 
Sketching angles in standard position

10:15  
Quiz 2 
Sketching angles in standard position

2 questions  
Lecture 4 
Quadrant of the angle

08:19  
Quiz 3 
Quadrant of the angle

2 questions  
Section 3: Angles and their measure  
Lecture 5 
Converting between degrees and dms

06:56  
Quiz 4 
Converting between degrees and dms

2 questions  
Lecture 6 
Finding coterminal angles
Preview

10:56  
Lecture 7 
Finding coterminal angles, example 2

12:23  
Quiz 5 
Finding coterminal angles

2 questions  
Quiz 6 
Functions of negative angles

2 questions  
Lecture 8 
Converting between degrees and radians

03:48  
Lecture 9 
Converting between degrees and radians, example 2

04:30  
Quiz 7 
Converting between degrees and radians

2 questions  
Lecture 10 
Oriented arc for a real number

05:41  
Quiz 8 
Oriented arc for a real number

2 questions  
Lecture 11 
Area of a circular sector

03:51  
Quiz 9 
Area of a circular sector

2 questions  
Quiz 10 
Linear and angular velocity

2 questions  
Section 4: The unit circle  
Lecture 12 
Finding sine and cosine of an angle theta

04:07  
Quiz 11 
Finding sine and cosine of an angle theta

2 questions  
Lecture 13 
Finding sine given cosine, or vice versa

09:59  
Quiz 12 
Finding sine given cosine, or vice versa

2 questions  
Lecture 14 
All possible values for the angle theta

08:28  
Lecture 15 
All possible values for the angle theta, example 2

09:05  
Quiz 13 
All possible values for the angle theta

2 questions  
Lecture 16 
All possible values for the real number t

03:50  
Lecture 17 
Completing a right triangle

06:01  
Quiz 14 
Completing a right triangle

2 questions  
Lecture 18 
Finding the side lengths of the triangle

02:44  
Quiz 15 
Reference angle theorem

2 questions  
Lecture 19 
Given a point on the terminal side of the angle

03:48  
Quiz 16 
Given a point on the terminal side of the angle

2 questions  
Section 5: Six circular functions  
Quiz 17 
Domain and range of the circular functions

2 questions  
Lecture 20 
Find the value or say where the function is undefined

08:25  
Quiz 18 
Find the value or say where the function is undefined

2 questions  
Lecture 21 
Find all six trig functions given the quadrant of the angle

12:04  
Quiz 19 
Find all six trig functions given the quadrant of the angle

2 questions  
Lecture 22 
Find all six trig functions at the coordinate point

07:37  
Lecture 23 
Find all six trig functions using reciprocal identities

05:27  
Lecture 24 
Angle of elevation

04:23  
Quiz 20 
Angle of depression and elevation

2 questions  
Lecture 25 
Proving the trig equation

05:37  
Quiz 21 
Proving the trig equation

2 questions  
Lecture 26 
Proving the trig equation with pythagorean identities

05:49  
Section 6: Trig identities  
Lecture 27 
Evenodd identities

04:40  
Quiz 22 
Evenodd identities

2 questions  
Lecture 28 
Sumdifference identities

13:44  
Lecture 29 
Sumdifference identities, example 2

10:44  
Lecture 30 
Sumdifference identities, example 3

10:25  
Quiz 23 
Sumdifference identities

2 questions  
Lecture 31 
Doubleangle identities

06:10  
Quiz 24 
Doubleangle identities

2 questions  
Lecture 32 
Halfangle identities

08:47  
Quiz 25 
Halfangle identities

2 questions  
Lecture 33 
Producttosum identities

03:38  
Quiz 26 
Producttosum identities

2 questions  
Lecture 34 
Sumtoproduct identities

03:03  
Quiz 27 
Sumtoproduct identities

2 questions  
Lecture 35 
Using trig identities to prove the equation

08:36  
Quiz 28 
Using trig identities to prove the equation

2 questions  
Lecture 36 
List the solutions of the equation inside the interval

06:32  
Lecture 37 
List the solutions of the equation inside the interval, example 2

15:46  
Quiz 29 
List the solutions inside the interval

2 questions  
Lecture 38 
Finding the value of an inverse trig function

07:35  
Section 7: Graphing the trig functions  
Lecture 39 
Period and amplitude

05:40  
Quiz 30 
Period and amplitude

2 questions  
Lecture 40 
Sketching sine and cosine

12:09  
Quiz 31 
Sketching sine and cosine

2 questions  
Quiz 32 
Horizontal and vertical shifts

2 questions  
Lecture 41 
Comparing sine and cosine graphs

08:20  
Lecture 42 
Sequence of transformations

05:37  
Quiz 33 
Sequence of transformations

2 questions  
Quiz 34 
Graphing combinations of functions

2 questions  
Section 8: The law of sines and law of cosines  
Lecture 43 
Law of sines

06:14  
Quiz 35 
Law of sines

2 questions  
Lecture 44 
Law of cosines

07:05  
Quiz 36 
Law of cosines

2 questions  
Lecture 45 
Law of sines for area of a triangle

05:50  
Lecture 46 
Heron's formula for area of a triangle

06:54  
Quiz 37 
Area of a triangle

2 questions  
Section 9: Midterm exam  
Quiz 38 
Midterm exam

37 questions  
Section 10: Polar coordinates  
Lecture 47 
Converting polar coordinates to rectangular

04:14  
Lecture 48 
Converting rectangular coordinates to polar

05:21  
Lecture 49 
Express the polar point multiple ways

06:37  
Lecture 50 
Converting equations from polar to rectangular

03:37  
Lecture 51 
Converting equations from rectangular to polar

04:50  
Section 11: Graphing polar curves 
I used to do #napkinmath. Now I make videos and other resources to help math students understand the important stuff and pass their classes.