Question about Texas Instruments TI-89 Calculator

# Log & reciprocal functions

I can't find lo and reciprocal functions tabs.

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• Anonymous Oct 27, 2008

i dont not know where to access the reciprocal function on the TI-89

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There is no log (base 10) button on a TI-89. It's buried in the CATALOG as log(. As a shortcut, you can do ln(#)/ln(base), where # and base are replaced with what you want. For the inverse of a log, do the base raised to the part on the other side of the equals sign. So, log(x) = 2 would become 10^2 = x.

Posted on Oct 04, 2009

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A set a parentheses would sure help remove any ambiguities.
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Here is a screen capture to convince you.

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