Texas Instruments TI-73 用户手册

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 211 of 12

Hint: This chapter’s section entitled “Graphing Trig

Functions” contains an example which graphs and traces

 to show undefined Y values for the function.

 

Inverse Trig Functions -

 

  u

 

The inverse trig functions calculate the smallest angle that

gives a particular sine, cosine, or tangent. For example, 

calculates the angle whose sine is .5.

value

value

value

For 

 (also called arccosine) and 

(also called arcsine),

M1value1.
All inverse trig functions return the arcsine, arccosine, or

arctangent of value or of each element in a list. If value is a

list, the calculator calculates the inverse trig function of each

element in the list, and a list is returned.

 

In trig calculations, angles are interpreted as degrees ( 

¡

 ) or

radians ( 

 ), depending on the Angle mode setting, 

 or

.

Set the Angle mode from the mode screen.

.

Depending on the Angle mode, sin(1) is the sine of either 1

¡

 or

1

. As you can see in the following illustration, 1

¡

 is not the

same as 1

. Therefore, sin(1

¡

) ƒ sin(1

 

). For correct results,

enter angle values in the same units (degrees or radians) as the

Angle mode setting.