Where am I going wrong with this (very simple) implicit derivative? [more inside]
posted by PuGZ on Nov 3, 2007 - 3 answers

Why is it that when I solve the inequality 0 ≤ arccos(x) <> cos(π/4)? Why do the operators switch direction? [more inside]
posted by PuGZ on Oct 19, 2007 - 11 answers

Quick maths [very basic trigometry] question. [more inside]
posted by PuGZ on Jul 30, 2006 - 9 answers