Texas-instruments TI-73 EXPLORER User Manual Page 218

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212
Chapter 11: Trigonometry
7311ENG.DOC CH 11 Trigonometry, English Julie Hewlett Revised: 05/26/98 11:12 AM Printed: 05/19/99 9:02
AM Page 212 of 12
To perform a trig calculation, select the Angle mode for your
value and then select the function. In
Radian
Angle mode,
angles are often defined in terms of p.
Calculate sin(30) in both degrees and radians.
1. Select the
Degree
Angle
mode.
.##b
2. Return to the Home screen,
and clear it, if desired.
-l:
3. Enter
sin(30)
.
-u
1
30
Eb
4. Change to the
Radian
Angle
mode, and return to the
Home screen.
.##"b
-l
5. Recall the previous entry to
recalculate
sin(30)
.
-£b
³
Degrees (
¡
)
90
¡
270
¡
180
¡
0
¡
, 360
¡
1
¡
=
1
360
of a circle
Radians (
r
)
p
2
3
p
2
p
0, 2
p
1
r
=
1
2
p
of a circle
Note:
1
r
= 57.29578
¡
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