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Texas Instruments TI-73 EXPLORER User Manual

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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

3 0

E b

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

1r =

1

2

p

of a circle

Note: 1r = 57.29578

¡