Correct layout of e^/LN/10^/LOG?

[Matt Agajanian]

(10-26-2024 08:28 PM)naddy Wrote:  

(10-26-2024 08:13 PM)Matt Agajanian Wrote:  I’m just going to toss this our there. How does everyone here feel about the HP-65 approach: putting the primary trig and exponential functions as the prinary key and have f^-1 key so that inverse trig, x^2, 10^x and e*x are accesed that way (or vice versa)?

Well, no, you had to access LN with f and e^ with f­⁻¹, etc.

This is basically equivalent to having f LN and g e^ on the same key, etc., which was used in any number of HP calcs that had at least two shift levels, e.g. HP-25, HP-67, HP-34C. It sort of solves the problem whether logarithm or antilogarithm should be primary: neither is.

Well, I did say ‘or vice versa.’