Question about Texas Instruments TI-89 Calculator

@ symbol while using the equation writer. If I solve a system of equations involving sin or cos or tangent, the calculator gives me the answer with a "@" symbol. What does it mean????

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According to the TI-89 Guidebook:

This notation indicates an “arbitrary integer” that represents any integer. When an arbitrary integer occurs multiple times in the same session, each occurrence is numbered consecutively. After it reaches 255, arbitrary integer consecutive numbering restarts at @n0.

Posted on Jan 30, 2009

• Flortzweich Jan 30, 2009

Also:

This notation indicates an “arbitrary constant” that represents any integer. When an arbitrary constant occurs multiple times in the same session, each occurrence is numbered consecutively. After it reaches 255, arbitrary integer consecutive numbering restarts at @0.

So it's the same concept, just a little different. It all depends if it is shown as @n1 or @1 where 1 can be any integer to 255

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