Yes it is hidden you need to hit the green (Diamond) and press 7.
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a calculator with 4 functions!!!
The anti-log is "10^x" listed above the "LOG" key on a TI-86 calculator. All you have to do to use it is press the yellow "2nd" key (this means shift) and then press the "LOG" key.
Well, darling, to calculate log base 2 on your TI-86 calculator, you simply press the "LOG" button, then type in "2" and hit enter. Voila! You've got your answer. Now go forth and conquer those logarithms like the math boss you are.
On my CASIO fx-115MS it is the "log" button you need to press the "shift" button then press log and a small "10" will appear on your calculator screen. Hope this helps...
you see, i don't know.