Question about Casio FX-300MS Calculator

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Fx-83es i am having trouble finding the 'INV' button. in my revision guide it says to use it but i cant find it anywhere. there is an 'In' button but when i try and use that in my equation it doesnt give the answer the book has given. i have git my exam tommorow and really need 2 no.??

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  • 27 Answers

Try 1/x button, does that give you the correct answer ? guessing the inverse ?

Posted on Jun 01, 2008

  • Mikey1963
    Mikey1963 Jun 01, 2008

    sorry on that model it is the X-1 key

    eg enter 1/10 as fraction using the a Ab/c button, press = then press the X-1 key then = again to change to answer from 1/10 to 10

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1 Answer

How to calculate inv logs on casio fx-82 au plus?


The inverse of log functions are power functions.
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am having trouble simplifying... Solve I am having trouble simplifying ratios on the FX-83ES. Any ideas? For example 10:5 should come up... (More) I am having trouble simplifying ratios on the FX-83ES. Any ideas? For example 10:5 should come up with 2:1, but it comes up with 10 when I press =.

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1 Answer

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You didn't specify what calculator you have.

On my TI30XA, 0.6339869 '2nd' 'COS-1' gives 50.655114
On my Windows XP calculator, 0.6339869 'Inv' 'cos' gives 50.655114
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I hope one of these helps. If not, let me know what calculator you have and I'll figure it out.

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look for something with line in it

Steve :P

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Press Shift and then In 

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x10 to the power of x is the EXP button, just press this and then the number it is to the power of!

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there is a button SD close to AC button, standard - decimal try it .......or
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