e has always bothered me — not the letter, but the mathematical constant. What does it really mean?| betterexplained.com
What does matrix multiplication mean? Here's a few common intuitions:| betterexplained.com
Sine waves confused me. Yes, I can mumble "SOH CAH TOA" and draw lines within triangles. But what does it mean?| betterexplained.com
Euler's identity seems baffling:| betterexplained.com
It’s an obvious fact that circles should have 360 degrees. Right?| betterexplained.com
Like making engineering students squirm? Have them explain convolution and (if you're barbarous) the convolution theorem. They'll mutter something about sliding windows as they try to escape through one.| betterexplained.com
Imaginary numbers have an intuitive explanation: they “rotate” numbers, just like negatives make a “mirror image” of a number. This insight makes arithmetic with complex numbers easier to understand, and is a great way to double-check your results. Here’s our cheatsheet:| betterexplained.com
Imaginary numbers perform rotations. So what's the difference between $2 i$ and $2^i$?| betterexplained.com
If the exponential function $e^x$ is water, the hyperbolic functions ($\cosh$ and $\sinh$) are hydrogen and oxygen. They're the technical, rarely-discussed parts that combine into a famous whole.| betterexplained.com
The Fourier Transform is one of deepest insights ever made. Unfortunately, the meaning is buried within dense equations:| betterexplained.com
Imaginary numbers always confused me. Like understanding e, most explanations fell into one of two categories:| betterexplained.com
Despite two linear algebra classes, my knowledge consisted of “Matrices, determinants, eigen something something”.| betterexplained.com