Owner's Manual

TI-89 / TI-92 Plus Calculus Tools Page 12
F2:Deriv
F2 1:Tangent Line
Displays the problem-entry dialog box for the tanLine(...)
function along with an example problem (page 35).
F2 2:Normal Line
Displays the problem-entry dialog box for the prpendic(...)
function along with an example problem (page 34).