Dear HP Gurus :),
I have recently purchased on ebay an HP28S (at last!!!!) which works fine but unfortunately with no owner manuals.
My question is:
I have to work with very simple vectors calculations (speed and course of a ship added to speed and course of a stream/tide) and I get "strange" results from my HP28S (sure, I'm doing something wrong).
Let's show a very simple (and quite stupid, I know!) example:
Speed of ship: 10 kts.
Ship Course: 0 degrees (north)
stream speed: 5kts.
stream course/direction: 180 degrees (south).
Of course, anybody needs a calculator for this example!!!. Resulting vector is: (5,0). So, real speed 5 kts, real course 0 deg (no changes).
Ok, but when I do the vector summation, I get: (15,180)
My inputs:
(10,0) as first vector
(5,180) as second vector
+ (addition)
(15,180).
On my Hp48GX needed to change to cyl coordinates...
What am I doing wrong?...
any advice will be highly appreciated. Inbetween, I look for a manual...
Best regards and greetings from Spain!,
JuanMi