- #1

Icebreaker

## Main Question or Discussion Point

A friend told me that Feynman used his own set of trig notations because he found "sin x" ambiguous. Apparantly he replaced it with a [tex]\sigma[/tex] stretched over the x like a square root. He did similar things for the other trig notations as well, but I can't find any of this info anywhere. Anyone know if this is true?