Texas Instruments TI-73 Explorer - Page 219

Chapter 11: Trigonometry
213
7311ENG.DOC CH 11 Trigonometry, English Julie Hewlett Revised: 05/26/98 11:12 AM Printed: 05/19/99 9:02
AM Page 213 of 12
In
Degree
Angle mode, calculate tan
-
1
(1). Check your answer.
1. Select the
Degree
Angle
mode.
.##b
2. Return to the Home screen,
and clear it, if desired.
-l:
3. Enter
tan
-1
(1)
.
-u
6
1
Eb
4. Using the result, enter
tan(45)
.
-u
5
45
Eb
In Radian mode, calculate cos(p/4).
1. Select the
Radian
Angle
mode.
.##"b
2. Return to the Home screen,
and clear it, if desired.
-l:
3. Enter
cos(p/4)
.
-u
3
-„F
4
Eb
³
³
This confirms the
previous result.