COTAN
Set to 3 different clues across 3 published puzzles, most often “Trig ratio” — The New York Times, Saturday, 21 August 2010.
5 letters
Every clue on record, most used first
- Trig ratioonce
The New York Times — Saturday, 21 August 2010
- Right-triangle ratio, for shortonce
The New York Times — Sunday, 5 December 1999
- Trig functiononce
The New York Times — Tuesday, 20 December 1994