HP HP-15C - Page 20

18
Section 1: Using | SOLVE | Effectively
To save program memory space and execution time, store the
following constants in registers and recall them as needed:
and is stored in register R0,
and is stored in register Rl5
and is stored in register R2.
The derivative of the intensity E with respect to the angle 0 is given
by
rl = cos(2irh)
-cos(27r/i)]
dE
-
d6
\
— i~9 rnsi
"
cos(r0cosd) —
sine tan 6
Key in a subroutine to calculate the derivative.
Keystrokes
[TIlP/Rl
rflCLEARfPRGMl
[cos!
|RCL|0
E
[COS |
[RCL|1
E
fSJNl
H
I TAN I
E
Display
IRCLIO
000-
001-42,
002-
003-
004-
005-
006-
007-
008-
009-
010-
011-
012-
013-
014-
015-
016-
017-
,21, 0
24
45 0
20
24
45 1
30
34
23
10
34
25
10
16
34
24
45 0
Program mode.