Texas Instruments TI-73 EXPLORER - Manual (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
E b
4. Using the result, enter
tan(45)
.
- u
5
4 5
E b
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
E b
³
³
This confirms the
previous result.