Texas Instruments TI-84 - Manual (Page 488)

Chapter 17: Activities 485
Solving a System of Nonlinear Equations Solving a System of Nonlinear Equations Solving a System of Nonlinear Equations Solving a System of Nonlinear Equations
Problem Problem Problem Problem
Using a graph, solve the equation x
3
N2x=2cos(x). Stated another way, solve the system
of two equations and two unknowns: y = x
3
N2x and y = 2cos(x). Use
ZOOM factors to
control the decimal places displayed on the graph.
Procedure Procedure Procedure Procedure
1. Press
z. Select the default mode settings. Press o. Turn off all functions and stat
plots. Enter the functions.
2. Press
q
4 to select 4:ZDecimal . The display shows that two solutions may exist
(points where the two functions appear to intersect).
3. Press
q ~
4 to select 4:SetFactors from the ZOOM MEMORY menu. Set XFact=10
and YFact=10 .