So I got a cosiner.
MY TOE SIS!
And in the left corner, paper weight champion of the world....
This is just in the middle of a chapter and isn't even acknowledged by the surrounding passages. It's pretty baaad if you ask me. But really, thanks to this picture I will never forget what a shear transformation does.
Textbook is Linear Algebra and Its Applications by David C. Lay, since for some reason I feel like I should probably cite it.
Because it's the PHENYL CHAPTER :D
"Here's looking at Euclid."