Conjugation on the HP-35s

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HP Forum Archive 17

Conjugation on the HP-35s
Message #1 Posted by Karl Schneider on 11 Aug 2007, 5:27 a.m.

As many of us know, the HP-35s offers easy entry of new complex numbers from the keyboard, but is missing basic functionality for manipulating or dissassembling complex numbers, or for assembling them from previously-obtained values.
Here's a reasonable workaround for the complex-conjugate function (i.e., negation of the imaginary component):
The product of a complex number and its conjugate is its magnitude squared,
ZZ^* = |Z|²
So, Z^* = |Z|² / Z
With a complex number in the x-register,

ENTER ABS x² x<>y /
will give its complex conjugate.

Edited: 11 Aug 2007, 5:50 a.m.

Re: Conjugation on the HP-35s
Message #2 Posted by Jeff O. on 11 Aug 2007, 2:42 p.m.,
in response to message #1 by Karl Schneider

Karl,
Very nice. The best I had come up with so far was:

ENTER ARG ->RAD i2 * e^x /

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