Texas Instruments TI-84 Plus Calculator Logo
Posted on Jan 14, 2010
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How do I make a percent and delta sign?

How do I make a percent sign? How do I make a Delta sign?

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k24674

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  • Texas Instru... Master 8,093 Answers
  • Posted on Jan 15, 2010
k24674
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Sorry, the TI83/83Plus/84/84PLUS/ Silver edition do not have a key or a command to calculate a %, or enter a % symbol. They do not have Greek alphabet letters either.
However in the Finance application there is a TVM variable called tvm_I% but you cannot isolate the % symbol. Similarly, in the TABLE setup you have DeltaTbl variable that fixes the step in a table, but you cannot isolate the Delta symbol.

These are the native capabilities of this family of calculators, and that does not mean that there does not exist a third-party program that can do what you want. You can look on the ticalc.org website.

Just wondering, why would you need these particular symbols when they mean nothing to the calculator?

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Hi rayalak857,

Have a nice day.


Calculator does not have a solve program, but you can use it to solve the quadratic equation with a little effort. If you know the theory skip toward the end.
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Let aX^2+bX+C=0
1. First calculate the discriminant usually called Delta and given by
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