Texas Instruments TI-89 User Manual - Page 881

Each solution variable starts at its guessed value if there is one; otherwise, it starts at 0.0. Use guesses to seek additional solutions one by one. For convergence, a guess may have to be rather close to a solution. solve(e^(z)ùy=1 and ëy=sin(z),{y,z=2p}) ¸ y=.001... and z=6.281... SortA MATH/List menu SortA listName1[, listName2] [, listName3] ... SortA vectorName1[, vectorName2] [, vectorName3] ... Sorts the elements of the first argument in ascending order. If you include additional arguments, sorts the elements of each so that their new positions match the new positions of the elements in the first argument. All arguments must be names of lists or vectors. All arguments must have equal dimensions. {2,1,4,3}! list1 ¸ SortA list1 ¸ list1 ¸ {4,3,2,1}! list2 ¸ SortA list2,list1 ¸ list2 ¸ list1 ¸ {2,1,4,3} Done {1 2 3 4} {4 3 2 1} Done {1 2 3 4} {4 3 2 1} SortD MATH/List menu SortD listName1[, listName2] [, listName3] ... SortD vectorName1[,vectorName 2] [,vectorName 3] ... Identical to SortA, except SortD sorts the elements in descending order. {2,1,4,3}! list1 ¸ {1,2,3,4}! list2 ¸ SortD list1,list2 ¸ list1 ¸ list2 ¸ {2 1 4 3} {1 2 3 4} Done {4 3 2 1} {3 4 1 2} 4Sphere MATH/Matrix/Vector ops menu vector 4Sphere Displays the row or column vector in spherical form [r q f]. vector must be of dimension 3 and can be either a row or a column vector. Note: 4Sphere is a display-format instruction, not a conversion function. You can use it only at the end of an entry line. [1,2,3]4Sphere ¥ ¸ [3.741... 1.107... .640...] [2,pà4,3]4Sphere ¥¸ [3.605... .785... .588...] ¸ [‡13 p4 cosê (3ø1‡313)] Z ρ Y θ X startTmr() CATALOG startTmr() ⇒ integer Returns the current value of the clock in its integer representation, giving the starttime for a timer. You can enter the starttime as an argument in checkTmr() to determine how many seconds have elapsed. You can run multiple timers simultaneously. Note: See also checkTmr() and timeCnv(). startTmr() ¸ checkTmr(148083315) 148083315 34 startTmr()!Timer1 © startTmr()!Timer2 © checkTmr(Timer1)!Timer1Value © checkTmr(Timer2)!Timer2Value Appendix A: Functions and Instructions 881