HP HP-15C - Page 21

Section 1: Using [SOLVE] Effectively
19
Keystrokes
s
fSJNl
|RCL|0
s
0
|RCL|2
a
[T||RTN|
Display
018-
019-
020-
021-
022-
023-
024-
025-
20
23
45 0
20
40
45 2
20
43 32
In Radians mode, calculate and store the three constants.
Keystrokes
nnip/Ri
|COS||STO|1
| CHS 11 [+]
M/x||STO|2
Display
6.2832
3.7699
-0.8090
1.8090
0.5528
Run mode.
Specifies Radians mode.
Constant r().
Constant r^
Constant r2.
The relative field intensity is maximum at an angle of 90°
(perpendicular to the tower). To find the minimum, use angles
closer to zero as initial estimates, such as the radian equivalents of
10° and 60°.
Keystrokes
10|T||-»RAD|
Display
0.1745
1.0472
0.4899
-5.5279
0.4899
28.0680
Initial estimates.
Angle giving zero slope.
-10 Slope at specified angle.
Restores the stack.
Angle in degrees.