anyone else using the TI-89?

[Natters]

having trouble with it

[funkyducky]

What's wrong? I've got the 89

[abeybaby]

whats the issue? its an awesome calc... i prefer it over the nspire, except for the slower processor..

[Natters]

well i solved one problem but another came up;
initially i couldnt plot the circ functions but it was on degrees from the further exam

but now im trying to solve for the circular functions and it keeps giving me a general solution of something like @n+2/pi or something like that
anyone know how to stop that shit?
ive tried putting in a domain, doesnt work =\

[abeybaby]

you have to type:

solve(sin(x)=1/2,x)|-2pi<x<2pi

you have to put int he restriction AFTER the solve bracket.

[Natters]

ahk
i was going
solve(sinx=1,x and -2<x<2,x)
in hindsight i think thats for simultaneous linear equations (the and thing)

[abeybaby]

ahk
i was going
solve(sinx=1,x and -2<x<2,x)
in hindsight i think thats for simultaneous linear equations (the and thing)

or for more restriction, so like:

solve(sin(t*x)=1/2,x)|t=pi/2 and 0<x<4pi

[paulsterio]

the worst thing about the ti-89 (i used to use it prior to the classpad) has got to be learning the syntax, you just can't beat the classpad templates!

[abeybaby]

lol, I hate the classpad so much!

[paulsterio]

lol, I hate the classpad so much!

why? what's wrong with it?
(sorry kinda off topic, but kinda related)

[abeybaby]

Itdoesnt solve those questions where it's like for which values of m does this system have no solutions, it gave me a wrong answer. And it doesn't give you dy/dx from the graphing screen and it doesn't carry over things you've defined into separate screens. And it's an absolute pain to type anything! Plus it's quite slow...

[Natters]

btw does anyone know how to get this pos to give me an actual answer
the im trying to get inverse tan of 1/3
it either says .37 or smth like that (which is useless because i need it in radians mode), or spits what i typed in at me
so goddamn frustrating
i can't get it to give me a pi/n answer bleh

[abeybaby]

btw does anyone know how to get this pos to give me an actual answer
the im trying to get inverse tan of 1/3
it either says .37 or smth like that (which is useless because i need it in radians mode), or spits what i typed in at me
so goddamn frustrating
i can't get it to give me a pi/n answer bleh

Im fairly sure there is no exact value for that, only gonna get decimals.. it doesnt exist as a pi/n... (i think)