Evaluate the composition of trigonometric functions by creating a right triangle. In this video we will evaluate the tangent by given the ratio for cosine. To do this we will use right triangle and ...

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 ...