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).
-u1
30Eb
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
3p
2
p0, 2p
1r = 1
2p of a circle
Note: 1r = 57.29578¡