How can I get decimal answers on my TI-89 calculator when using pi?

  • Thread starter Thread starter Ryuk1990
  • Start date Start date
  • Tags Tags
    Calculator Ti-89
AI Thread Summary
To obtain decimal answers on a TI-89 calculator when using pi, users should check the calculator's mode settings to switch between decimal and exact formats. Inputting expressions like 2(pi)x1.0 can also yield decimal results. Pressing the green button with a dot allows toggling between exact and decimal answers, depending on the current mode. The calculator defaults to exact values to prevent rounding errors, which can be adjusted in the settings. Understanding these functionalities can help users effectively manage their calculations.
Ryuk1990
Messages
157
Reaction score
0
This is not necessarily a math question, but I have a problem with a TI-89 calculator. Calculating something with pi doesn't give me a decimal answer. For example, if I put in 2*pi, it will just give an answer of 2pi instead of 6.28. How do I fix this?
 
Mathematics news on Phys.org
It frequently does that sort of thing, preferring things like 3/5, for example. Unfortunately I have been told not to just give away answers, so I can only say that you have to study the manual. One reason the calculator does that is to avoid the error of round off.

However, besides a certain button, just like with PARI--a free download--you can sometimes get around such things by writing 2(pi)x1.0, and trying that.
 
Last edited:
Two solutions as far as I can remember. I think there is a setting in modes for decimal or exact and settings, you could switch that.

Or if you press the green button (the one with the dot) it will give answers in decimal if you are in exact mode, and exact answers if you are in decimal mode.
 

Thread 'What Exactly is Dirac’s Delta Function? - Insight'

Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
View full post »

Thread 'Non-orthogonal bases'

Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
View full post »

Similar threads

What's the difference between Ti-89 and Ti-92 graphing calculators?
Replies
4
Views
2K
How TI-89 Calculator Rearranged Exponent Confusion - Ben
Replies
2
Views
1K
Why is My TI-89 Not Evaluating the Fourier Transform Correctly?
Replies
1
Views
2K
MHB How do I get the book's answer for finding the area of a gable?
Replies
4
Views
1K
How do I find this answer on TI-89 calculator?
Replies
2
Views
2K
Calculators RE- TI Nspire CX CAS vs Casio Classpad vs TI 89
Replies
6
Views
6K
I Alternating Harmonic Numbers are cool, spread the word!
Replies
4
Views
2K
Convert and Calculate Dimensions with Ti-89
Replies
1
Views
2K
MHB Misunderstanding between converting radians and degrees
Replies
19
Views
7K
Calculators How to find the Wronskian on Ti-89?
Replies
1
Views
5K

Hot Threads

Recent Insights

Back
Top