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I know this is very subjective and probably ask a few hundred thousand times. I'm an mech engineering student looking to upgrade from my ti 83. I know atleast so far my math classes wont allow a CAS capable calculator, and that you can get the interchangable keyboards to remove that function. And as far as I know there is know CAS program for the Prizm. Is the CAS system really that helpful?, I've never had the chance to use it. I know Id use the graphing feature of it alot and integral/derivative features of them both and program in notes for formulas etc. Is it justifiable to spend another $50 on the Nspire if I can't use the CAS touchpad keyboard of it?

Thanks guys

I've posted this in Mech E forum as well hoping to get a wider variety of answers

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# Calculators TI Nspire or Casio Prizm

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