Question about Texas Instruments TI-83 Plus Calculator
Posted by Anonymous on
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Posted on Jan 02, 2017
Alot of people seem to be having this problem. Angles can be measured
in two units, degrees and radians. Your calculator is currently doing
everything in terms of radians. I have an 84 but I'm sure the 83 is
similar, go under MODE and look for Degrees and Radians and make sure
you choose degrees. if you have to convert, 360[degrees] = 2* pi
(easy to remember, 360deg in a circle, 2pi radians in a circle)
Posted on Aug 12, 2009
I have just done what you said you had done, but I got a nice, correct table of values. You might have discoverd a secret command to clear memory.
Posted on Sep 09, 2009
The derivative of the cubic root of x is, as you wll know, equal to (1/3)*x^(-2/3). Its limit as x approaches 0 is undefined. However the calculator uses approximate representations of numbers to calculate. And you can never be sure what it is going to give as results near singularities (poles of functions).
Calculators with Computer Algebra Systems can do better. To show you this, I am enclosing a screen capture showing you the correct result.
On this screen I defined a function u =f(v) where u is the derivative of cubic root of v. I stored 0 in the dummy variable v, and I evaluated the function u at v=0. You can see that the result displayed is undefined.
That this result is deemed correct seems to me just a matter of convention. We do not know, we cannot know, or we dont care to know? It will not make any of us lose sleep.
Hope it helps.
Posted on Nov 10, 2009
SOURCE: my TI-83 calculator is giving
Try reseting your calculator if needed, and sometimes answers can be off because the calculator sometimes is so precise you answers may be rounded.
Posted on Mar 10, 2011
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