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.

All tracks are written by Reggie Gibson, except for tracks 6 and 7 written with Gregory Jacobs This 1990s hip-hop album–related article is a stub.

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