HP 15C Shortcut for (Complex Absolute Value)

10272017, 08:53 AM
(This post was last modified: 10272017 09:09 AM by Gamo.)
Post: #1




HP 15C Shortcut for (Complex Absolute Value)
Very short steps to calculate Complex Absolute Value with (Add or Subtract)
This work on any Scientific Calculator that have [→P] function Formula: │a+ib│ = √(a^2+b^2) Example: │3 + 4i│ = 5 Steps: 1. (b) ENTER >4 2. (a) →P >3 Gamo 

10272017, 08:55 AM
Post: #2




RE: HP 15C (Complex Absolute Value)
Why not just use complex mode on the 15C?
Pauli 

10272017, 09:04 AM
(This post was last modified: 10272017 09:09 AM by Gamo.)
Post: #3




RE: HP 15C (Complex Absolute Value)
Thanks Paul Dale
Forgot to mention that this is a shortcut way of doing it. 

10272017, 09:25 AM
(This post was last modified: 10272017 09:36 AM by Dieter.)
Post: #4




RE: HP 15C Shortcut for (Complex Absolute Value)
(10272017 08:55 AM)Paul Dale Wrote: Why not just use complex mode on the 15C? FTR: this also works nicely on the 35s (which has no dedicated P↔R functions): 3 [i] 4 [ABS] => 5. On the other hand the →P method mentioned by Gamo is quite handy for chain calulations. Sometimes the sum of the squares is the square of a sum, i.e. s² = a²+b²+c²+... For instance in photography: Suppose you have the fnumber readings for three individual light sources shining on a subject, say f/8, f/11 and f/2,8. Then the value for the sum of all three can be determined easily with 8 [ENTER] 11 [→P] 2,8 [→P] => f/14 The same method can be used for the guide numbers of multiple flashguns firing in the same direction. Dieter 

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