Quick TI-92 help

[Treadstone]

anyone know the syntax for soloving a systems of eqs? I forgot what is was and cant re-figure it out...i know its somethng like solve(f(x,y)=a; or , f(x,y)=b, or ; (a,b)) or smoething like that

 

for example

 

a + b = 2

3a + b^2 = 8

 

just pull out of my head for the syntax purposes

[Dave]

It won't do it for you; you have to re-arrange in terms of one variable using Solve() and then use | to pipe it into the other formula.

[Treadstone]

are you sure? becuase i distinctly remember doing it in calc last year...but ya i saw the | in the manual

 

 

i also have another, but unrelated, question....how do you find the maximum of a function say,

 

y(t)=2sin(3t) + cos(3t)

[Dave]

Differentiate it and set the differential equal to zero to find stationary points, then look at the second derivative to determine whether your stationary point is a maxima or a minima.

[Treadstone]

ahhh, thank you

[Dave]

No problem

[Treadstone]

i figured out the syntax...

 

solve(2x+3y=5 and x-y=3,{x,y})

 

that will solve both for x and y....just had to ask my calc proff from last year.

[MadScientist]

I don't know if this is of any use:

http://www.rit.edu/~jmwsma/calculators/ti92/ti92links/ti92links.html

[Dave]

i figured out the syntax...

 

solve(2x+3y=5 and x-y=3' date='{x,y})

 

that will solve both for x and y....just had to ask my calc proff from last year.[/quote']

 

Works on my TI-89 as well

[Treadstone]

its wicked helpful, lol