ATAR Notes: Forum

VCE Stuff => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Mathematics => Topic started by: /0 on December 28, 2008, 10:36:17 am

Title: The plus-minus sign
Post by: /0 on December 28, 2008, 10:36:17 am
If you have a TI-89 calculator, type in and brace for epic!!!!!!!!!!!!!!!!!!!!!!!

(This might work on other TIs)

This is the first time I have seen Mr. Calculator use it. The sign is nowhere to be found in CATALOG. Wtf  :uglystupid2:?
And why can't it use when solving quadratics? It would look so much nicer...
Title: Re: The plus-minus sign
Post by: methodsboy on January 07, 2009, 06:10:32 pm
LOL amazing stuff. (Y)
Title: Re: The plus-minus sign
Post by: methodsboy on January 07, 2009, 06:12:26 pm
if you want to keep it, just put it into the Y= Editor thing and write it like an equation, then you can just copy and paste it into the home screen when required.
Title: Re: The plus-minus sign
Post by: kurrymuncher on January 07, 2009, 06:22:46 pm
lol i found the plus minus sign. On the TI 89, just press second, then +. scroll down to math and press that. Now scroll down further to the letter N and theres the plus minus sign.

Or you can just type in {1,-1} infront of an equation and thats the same thing.
Title: Re: The plus-minus sign
Post by: ell on January 07, 2009, 06:29:15 pm
I get on my Titanium
Title: Re: The plus-minus sign
Post by: methodsboy on January 07, 2009, 06:49:45 pm
^ should be in Radian mode
Title: Re: The plus-minus sign
Post by: ell on January 07, 2009, 07:09:27 pm
Quote from: methodsboy on January 07, 2009, 06:49:45 pm
^ should be in Radian mode

It is in Radian mode - that's how I got the in the first place! :P
Title: Re: The plus-minus sign
Post by: /0 on January 07, 2009, 07:24:08 pm
isn't undefined?
Title: Re: The plus-minus sign
Post by: ell on January 07, 2009, 07:40:49 pm
Quote from: /0 on January 07, 2009, 07:24:08 pm
isn't undefined?



http://en.wikipedia.org/wiki/Sign_function