Texas Instruments TI89TITANIUM User Manual - Page 910
module about constants and measurement units., to select units from
UPC - 033317191833
View all Texas Instruments TI89TITANIUM manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 910 highlights
(magnitude angle) ⇒ complexValue (polar input) Enters a complex value in (rq) polar form. The angle is interpreted according to the current Angle mode setting. In Radian angle mode and Rectangular complex format mode: 5+3iì (10p/4) ¸ 5ì 5ø 2+(3ì 5ø 2)øi ¥¸ ë 2.071...ì 4.071...øi ¡, ', " 2 " key (¡), 2 È key ('), 2 É key (") dd¡mm'ss.ss" ⇒ expression In Degree angle mode: dd A positive or negative number mm A non-negative number ss.ss A non-negative number 25°13'17.5" ¸ 25°30' ¸ Returns dd+(mm/60)+(ss.ss/3600). This base-60 entry format lets you: • Enter an angle in degrees/minutes/seconds without regard to the current angle mode. • Enter time as hours/minutes/seconds. 25.221... 51/2 ' (prime) 2 È key variable ' variable '' Enters a prime symbol in a differential equation. A single prime symbol denotes a 1st-order differential equation, two prime symbols denote a 2nd-order, etc. deSolve(y''=y^(ë 1/2) and y(0)=0 and y'(0)=0,t,y) ¸ 2øy 3/4 3 =t _ (underscore) ¥ key expression_unit 3_m 4 _ft ¸ Designates the units for an expression. All unit names must begin with an underscore. Note: To type 4, press 2 . You can use pre-defined units or create your own units. For a list of pre-defined units, refer to the module about constants and measurement units. You can press 2 9 to select units from a menu, or you can type the unit names directly. variable_ When variable has no value, it is treated as though it represents a complex number. By default, without the _ , the variable is treated as real. If variable has a value, the _ is ignored and variable retains its original data type. Assuming z is undefined: real(z) ¸ real(z_) ¸ imag(z) ¸ imag(z_) ¸ Note: You can store a complex number to a variable without using _ . However, for best results in calculations such as cSolve() and cZeros(), the _ is recommended. 9.842...ø_ft z real(z_) 0 imag(z_) 910 Appendix A: Functions and Instructions