Sharp EL-9600 User Manual page 62

NAME _____________________________________________________ CLASS __________ DATE __________
2.2
EVALUATING TRIGONOMETRIC FUNCTIONS
Steps for evaluating sec (
+ –
1. Press
2. Press 2ndF
change it to degree mode. Press 2ndF
3. Enter and evaluate the expression by pressing MATH , touching A CALC,
double touching 09 sec, pressing 2ndF
E ANGLE, double touching 4 r, and pressing ENTER .
Steps for approximating tan 20° graphically
1. Press Y= and press CL to remove an old expression for Y1.
2. Press 2ndF
change it. Press 2ndF
3. Enter the function tan x for Y1 by pressing tan
4. Instead of graphing the function in the default viewing window for tangent,
press WINDOW adjust the Xmin and Xmax to 10° and 30° (value of interest
± 10° ) respectively to start out closer to the value of interest. Set the Xscl =
1. Press ZOOM , touch A ZOOM, and double touch 1 Auto to view the graph.
5. Now, engage the trace by pressing TRACE . Notice the tracer appears at
x = 20° since it is the middle of the x values.
58 Blackline Masters/TRIGONOMETRY USING THE SHARP EL-9600
) directly in degree mode
4
to enter computation mode.
SET UP to verify the calculator is in degree mode. If it is not,
SET UP to verify the calculator is in degree mode. If it is not,
QUIT to exit the menu.
QUIT to exit the menu.
a/b 4 MATH , touching
X/ /T/n .