Finding the area of a polygon seems impossible given just the side length or just the length of a radius or apothegm. But here’s how to do it, step by step.
Author: tamethemathdemonadmin
Here’s one of the things about complex numbers which is easier if you know it so well you don’t have to think about it: the formula for sin x. Nice and easy. Assumes you already know Euler’s formula, eix = cos x + i sin x.
A clear explanation of the epsilon-delta definition of a limit
Assuming you know the basics (tan=sin/cos, etc), here are strategies and examples for proving simple trig identities.
What are fraction exponents? Why is x⅓=∛x? Here’s an explanation.
You probably already know that 20=1. In fact any number to the power of 0 is one. But why?
Gauss was just ten years old when he discovered how to quickly add up a long series of numbers. Here I tell the story of how he outwitted his teacher and I also walk you through a mathematical proof.
A lively presentation of how to solve a two different word problems involving motion, using distance = rate * time. The text is a little small so click the “full screen” option to really see it. (I’ll redo this eventually — still learning ins and outs of Zoom!)
This video walks you through the multifarious steps and guides you past all the gotchas in solving an equilibrium problem. I’ll assume you know what equilibrium problems *are* and just need some practice *doing* them.
Lots of calculus students learn to solve differential equations without understanding what they really mean. Here’s a simple example of a differential equation so you can see how it works.