Evaluate the composition of trigonometric functions by creating a right triangle. In this video we will evaluate the tangent ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

Well, what is the best way to cut a sandwich in half? Surely triangles don't really have "more sandwich," right? That's geometry and the law of conservation of matter. But something about the ...

Everyone learns the number one rule about triangles in high school: the angles of a triangle add up to 180 degrees. But did you know that sometimes they don't? Triangles are much more interesting than ...