HP HP-15C - Trigonometric Operations; Trigonometric Modes

24 Section 1: Using [SOLVE| Effectively
Example: Solve the previous example without calculating the
derivative of the relative field intensity E.
The subroutine to calculate E and the required constants have been
entered in the previous example.
In Program mode, key in a subroutine that subtracts an estimated
extreme number from the field intensity E, The extreme number
should be stored in a register so that it can be manually changed as
needed.
Keystrokes
nnip/Ri
fflfLBLll
iGSBlfB]
|RCL|9
E
Display
000-
001-42,21, 1
002- 3212
003- 45 9
004- 30
Program mode.
Begins with label.
Calculates E.
Subtracts extreme
estimate.
005- 43 32
In Run mode, estimate the minimum intensity value by manually
sampling the function.
Keystrokes
10|T||-»RAD|
I ENTER |[?1 fBl
50[Tll-»RADl
I ENTER | |"f1 FBI
Display
0.1745
-0.1029
0.5236
-0.2028
0.8727
0.0405
Run mode.
Samples the function at
10°, 30°, 50°,....