Apparently, this user prefers to keep an air of mystery about them.
1 Calculate an angle from Tan, Cos, or Sine dec 24 '11
1 Find the radius of the tip of a die punch. jan 20 '14
1 Html Tag counting - Rate of Change formula aug 14 '12
1 Square Wave Intuition jan 26
0 Two vectors moving towards the same point - ensuring they both hit that point at the same time mar 15
0 Deriviation behind trigonometric equation jan 20 '14
0 Prove trigonometric identity for $\tan^2(\theta/2)$ feb 18 '14