Evaluating Trigonometric Functions - Sharp EL-9600 User Manual

NAME _____________________________________________________ CLASS __________ DATE __________
2.1

EVALUATING TRIGONOMETRIC FUNCTIONS

Steps for evaluating sin 45° directly
1. Turn the calculator on and press
2. Press CL to clear the viewing window of any old expressions.
3. Set the calculator to operate in degrees by pressing 2ndF
B DRG, and double touch 1 Deg. Press 2ndF
4. Enter and evaluate the expression by pressing sin
Steps for approximating sin (
1. Press Y= followed by CL to clear an old expression for Y1.
2. Enter the function sin x by pressing sin
radian mode by pressing 2nd F
2 Rad. Press 2nd F
3. View the graph by pressing ZOOM , touching E TRIG, double touching
1 sin x.
4. Now, engage the trace by pressing TRACE and tracing near x =
5. With the cursor located near x = 1.047, you can zoom in to find a better
approximation for the y value. Press ZOOM , touch A ZOOM, and double
touch 3 In to zoom in on the cursor.
6. Once again, trace over near x = 1.047. Zoom in one more time to see an even
better approximation.
+ –
to enter computation mode.
) graphically
3
SET UP , touch B DRG, and double touch
QUIT to exit the menu.
Blackline Masters/TRIGONOMETRY USING THE SHARP EL-9600
SET UP touch
QUIT to exit the menu.
4 5 ENTER .
X/ /T/n . Set the calculator to
= 1.047.
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