Re: program keys?


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Re: program keys?



>I have programmed my TI89 to 1/cos(x)->sec(x), but I
>would like to program the keyboard so that pressing
>alpha (the purple key) then the z key would output
>"sec(" on the screen, is this possible?

Similar things have been done, here's an example:
http://members.chello.at/gerhard.kofler/kevin/ti89prog.htm#xtrakeys

>One other thing, I have programmed
>x!/(x-y!)y!->c(x,y), but can I program it so "4c3"
>could do the same thing? I could save some key types
>that way,
>ie: "4","alpha","c","3"
>instead of "alpha","c","(","4",",","3",")"

No. I'm also curious why you don't just use the built in nCr() command.

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