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September 4, 2015
Posted by **Henry** on Friday, June 15, 2012 at 3:12pm.

- Calculus Review for exam grade 12, please help. -
**Steve**, Friday, June 15, 2012 at 4:37pmtan = sin/cos

tan' = (cos*cos + sin*sin)/cos^2 = 1/cos^2 = sec^2

- Calculus Review for exam grade 12, please help. -
**Henry**, Monday, June 18, 2012 at 6:13pmthank u !