Sharp EL-9900 Manual page 10

INVERSE TRIGONOMETRIC FUNCTIONS
To compute the inverse sine function in radians:
1. Turn the calculator on and press
home screen.
2. Change to radian mode by pressing 2ndF
and 2 (Rad). Press 2ndF
-1
3. Find sin (.4), press 2ndF
radians is shown below. To find the result in terms of π press ÷
π
ENTER .
To graph the inverse cosine function in radians:
1. Press Y=
-1
2. Enter cos
3. Set your viewing window by pressing ZOOM
-1
5 (cos x).
Advanced Keyboard/TRIGONOMETRY USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
QUIT to exit the menu.
-1
sin
CL to access and clear the Y1 prompt.
x for Y1 by pressing 2ndF
+ –
CL to access and clear the
×
÷
SET UP B (DRG)
• 4 ENTER . The answer of .4115
-1
cos X/θ/T/n
E (TRIG) and
8
2ndF
ENTER .