Hp 38g Graphing Calculator Manuel d'utilisateur Page 104

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Plotting the Equation
A plot shows you graphically where the solution(s) must be ;
» If you defined an expression, then the solution (root) is
where the graph intersects the x-axis.
® If you defined an equation, then there are two graphs, one
for each side of the equation. The solution is where the
two graphs intersect. (If one side of the equation is
constant, then one of the graphs will be a straight line.)
To plot an 1. Define the equation to solve in the Symbolic view
equation (|symb|).
2. If the equation uses trigonometric functions, set the angle
measure in Symbolic Setup view (■§ [SETUP-SYMB]).
3. Enter the known variables in the Numeric view ([ num]).
4. Highlight the independent variable in the Numeric view.
5. Press [VIEWS] and select Auto Scale {{OK}} to plot the
equation(s). Autoscaling usually gives you the best plot in
Solve.
4-6 Solve
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