Calculator User Manual

Chapter 2: Math, Angle, and Test Operations 61
fnInt(
fnInt(fnInt(
fnInt(
fnInt( (function integral) returns the numerical integral (Gauss-Kronrod method) of
expression with respect to variable, given lower limit, upper limit, and a tolerance (if not
specified, the default is 1âL5).
fnInt( is valid only for real numbers.
fnInt(expression,variable,lower,upper[,tolerance])
Note:
To speed the drawing of integration graphs (when fnInt( is used in a Y= equation),
increase the value of the
Xres window variable before you press s.
Using the Equation Solver
Using the Equation SolverUsing the Equation Solver
Using the Equation Solver
Solver
SolverSolver
Solver
Solver displays the equation solver, in which you can solve for any variable in an
equation. The equation is assumed to be equal to zero.
Solver is valid only for real
numbers.
When you select
Solver, one of two screens is displayed.
• The equation editor (see step 1 picture below) is displayed when the equation
variable
eqn is empty.
• The interactive solver editor is displayed when an equation is stored in
eqn.