Re: Emulators HP67 & HP12c MacBook Message #3 Posted by Egan Ford on 21 Mar 2008, 12:27 p.m., in response to message #1 by CaribbeanHP12c
Some textbooks define log() as the natural logarithmic function and log_{10}() as the base 10 logarithmic function. Whereas others use ln() and log() respectively, just like your HP67 and every other calculator I have used.
According to http://en.wikipedia.org/wiki/Logarithm mathematicians use log() and ln() for the natural logarithmic function, while engineers use log() for the base 10 logarithmic function.
When your textbook says to use the LN or LOG button, I would assume that the textbook author believes that ln() = log(). Possibly making the author more a mathematician than an engineer. And someone that has never used a calculator.
So....
Some textbook Calculator
 
log(1.01)_{ } = LN(1.01) = 0.00995
log_{10}(1.01) = LOG(1.01) = 0.00432
To answer your original question:
Quote:
how can i get the HP12c to calculate: LOG(1.01) = 0.004321374
That is log base 10. On your 12C you can use the LN function to get any base logarithm, e.g.:
LN(1.01)
log_{10}(1.01) =  = 0.00432
LN(10)
Quote:
Are there tutorials for the HP67?
http://www.hpmuseum.org/cd/cddesc.htm
Edited: 21 Mar 2008, 12:28 p.m.
