My what?
Oh, you mean Oscar Had A Headache Over Algebra.
I'd love to find a math cheat sheet poster with comparative mnemonics for the office wall. There are a ton of them. I imagine they vary depending on the pedigree of the teacher.
- Soh: sin θ = o/h
- Cah: cos θ = a/h
- Toa: tan θ = o/a
Where "θ" is the angle, "o" is the side opposite of the angle, "a" is the side adjacent to the angle, and "h" is the hypotenuse.
Or for the visually inclined:
+
/|
h / |
/ | o
/θ |
+----+
aWhenever I pass through central station in Sydney I hear my high school math teacher's voice:
Less than PI/2 "All are positive PI/2 through to PI "Sin is positive" PI through to 3/2 PI "Tan is positive" 3/2 PI through to 2PI "Cos is positive"