| Trigonometry | |
| Type: | studio |
| Artist: | Saafir |
| Cover: | Mr. No No No.jpg |
| Released: | January 20, 1998 |
| Recorded: | 1996–1997 |
| Genre: | Hip hop |
| Prev Title: | Boxcar Sessions |
| Prev Year: | 1994 |
| Next Title: | The Hit List |
| Next Year: | 1999 |
Trigonometry is the second album by American rapper Saafir and his only project released under the alias Mr. No No. It was dropped on January 20, 1998, via Hobo/Wrap Records. Production was handled by DJ JZ, J Groove, Shock G and the Porch Monkeys.