HP HP-15C - Page 81

SectionS: Calculating in Complex Mode 79
Keystrokes Display
[TirLBLlO 019-42,21, 0
[RCL14 020- 45 4 Recalls 360/n.
021-45,20,25 Calculates 360k/n using
Index register.
022- 42 30
023- 43 35
024- 1 Places l + i(k360/n) in
the X-register.
025- 43 7 Sets Degrees mode.
mf+Rl 026- 42 1 Calculates e^3607".
|RCL|2 027- 45 2 Recalls real part of z0.
|RCL| 3 028- 45 3 Recalls imaginary part
[Q[T] 029- 4225 Forms complex 20.
[x] 030- 20 Calculates z0elk360/n, root
number k.
|RCLinn 031- 4525 Recalls number k.
032- 34 Places zk in X-registers, k
in Y-register.
033- 1
034-44,40,25 Increments number k in
Index register.
035- 33 Restores zk and k to X-
and Y-registers.
|R/S| 036- 31 Halts execution.
|GTO|0 037- 22 0 Branch for next root.
Labels used: A and 0.
Registers used: R2, R3, R4, and Index register.
To use this program:
1. Enter the order n into the Y-register and the complex number
z into the X-registers.
2. Press (T) [A] to calculate the principal root, ZQ, which is placed
in the real and imaginary X-registers. (Press and hold [T] [71)1
to view the imaginary part.)