Texas Instruments TITANIUM TI-89 - Manual (Page 909)

Appendix A: Functions and Instructions 909
G
(gradian) MATH/Angle menu
expression1 G ¡¡¡¡ ⇒ ⇒ ⇒ ⇒ expression
list1 G ¡¡¡¡ ⇒ ⇒ ⇒ ⇒ list
matrix1 G ¡¡¡¡ ⇒ ⇒ ⇒ ⇒ matrix
This function gives you a way to use a gradian
angle while in the Degree or Radian modes.
In Radian angle mode, multiplies expression by
p /200. In Degree angle mode, multiplies
expression 1 by g/100.
In Gradian mode, returns expression1 unchanged.
In Degree, Gradian or Radian mode:
cos(50 G ) ¸
‡ 2
2
cos({0,100 G ,200 G }) ¸ {1,0.-1}
ô (radian) MATH/Angle menu
expression1 ô ⇒ ⇒ ⇒ ⇒ expression
list1 ô ⇒ ⇒ ⇒ ⇒ list
matrix1 ô ⇒ ⇒ ⇒ ⇒ matrix
In Degree angle mode, multiplies expression1 by
180/ p. In Radian angle mode, returns expression1
unchanged. In Gradian mode, multiplies
expression1 by 200/ p.
This function gives you a way to use a radian
angle while in Degree and Gradian mode.
Hint: Use ô if you want to force radians in a
function or program definition regardless of the
mode that prevails when the function or program
is used.
In Degree, Gradian or Radian angle mode:
cos((p/4)ô ) ¸
‡ 2
2
cos({0ô,(p/12)ф,л pф }) ¸
{ 1
( 3+1)ш 2
4
л 1 }
¡¡¡¡ (degree) 2 “ key
expression1 ⇒ ⇒ ⇒ ⇒ expression
list1 ¡¡¡¡ ⇒ ⇒ ⇒ ⇒ list
matrix1 ¡¡¡¡ ⇒ ⇒ ⇒ ⇒ matrix
In Radian angle mode, multiplies expression by
p/180. In Degree angle mode, returns expression
unchanged.In Gradian angle mode, multiplies
expression1 by 10/9.
This function gives you a way to use a degree
angle while in Gradian and Radian mode.
In Degree, Gradian or Radian angle mode:
cos(45¡) ¸
‡ 2
2
cos({0,p/4,90¡,30.12¡}) ¥ ¸
{1 .707
...
0 .864
...
}
    (angle) 2 ’ key
[ radius, q_ angle ]
⇒ ⇒ ⇒ ⇒ vector (polar input)
[ radius, q_ angle,Z_coordinate ] ⇒ ⇒ ⇒ ⇒ vector
(cylindrical input)
[ radius, q_ angle,  f_angle ]
⇒ ⇒ ⇒ ⇒ vector
(spherical input)
Returns coordinates as a vector depending on the
Vector Format mode setting: rectangular,
cylindrical, or spherical.
[5,60¡,45¡] ¸
In Radian mode and vector format set to:
rectangular
cylindrical
spherical