Texas Instruments TI-89 User Manual - Page 909
In Degree, Gradian or Radian angle mode, In Radian mode and vector format set
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G (gradian) MATH/Angle menu expression1G ¡ ⇒ expression list1G ¡ ⇒ list matrix1G ¡ ⇒ matrix This function gives you a way to use a gradian angle while in the Degree or Radian modes. In Degree, Gradian or Radian mode: cos(50G) ¸ ‡2 2 cos({0,100G,200G}) ¸ {1,0.-1} 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. ô (radian) MATH/Angle menu expression1ô ⇒ expression list1ô ⇒ list matrix1ô ⇒ 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)ô,ë pô }) ¸ {1 ( 3+1r4e)cøtan2guëla1r} cylindrical spherical ¡ (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) [5,60¡,45¡] ¸ In Radian mode and vector format set to: Returns coordinates as a vector depending on the Vector Format mode setting: rectangular, cylindrical, or spherical. Appendix A: Functions and Instructions 909