Determining the amplitude and period of sine and cosine functions.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Revisiting the proofs of some trigonometry identities.

This tutorial is a catch-all for a bunch of things that we haven't been able (for lack of time or ability) to categorize into other tutorials :(

How many ways can we pick officers for our organization?

Basics of probability and combinatorics. If want to display your Chuck Norris dolls on your desk at school and there is only room for five of them. Unfortunately, you own 50. How many ways can you pick the dolls and arrange them on your desk? What if you

Probability of exactly 3 heads in 5 flips using combinations

Basics of probability and combinatorics. This tutorial will apply the permutation and combination tools you learned in the last tutorial to problems of probability. You'll finally learn that there may be better investments than poring all your money int

Saving Earth from becoming a mushroom farm.

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

Introduction to Function Inverses

Revisiting what a function is and how we can define and visualize one.

Thinking about where the graphs of sin and cos intersect.

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Basic interpretation of the graph of the cosine function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

The probability of getting exactly 2 heads when flipping three coins. Thinking about this by visualy depicting all of the outcomes.

Basics of probability and combinatorics. This tutorial will apply the permutation and combination tools you learned in the last tutorial to problems of probability. You'll finally learn that there may be better investments than poring all your money int

Introduction to trigonometry

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Determining a trig function given its graph

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Extending SOH CAH TOA so that we can define trig functions for a broader class of angles

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Some practice solving systems graphically

What happens when we have many variables but also many constraints.

Trigonometry problem involving two ships colliding.

If you're starting to sense that there may be more to trig functions than meet the eye, you are sensing right. In this tutorial you'll discover exciting and beautiful and elegant and hilarious relationships between our favorite trig functions (and maybe a

Vi Hart visits Khan Academy and talks about Benford's Law with Sal

An look at exponential and logarithmic functions including many of their properties and graphs. This tutorial shows you what a logarithmic function is. It will then go on to show the many times in nature and science that these type of functions are useful

Using Trigonometric functions to solve the sides of a right triangle

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Example using calculator to evaluate inverse tangent function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Thinking about the different ways we can pick officers in order to find the probability of one situation in particular.

Basics of probability and combinatorics. This tutorial will apply the permutation and combination tools you learned in the last tutorial to problems of probability. You'll finally learn that there may be better investments than poring all your money int

Exploring the graphs of trig functions

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.

Visualizing changes in amplitude and period for a cosine function

Videos and exercises on trigonometry. Watch the Geometry playlist first if you have trouble understanding the topics covered here.