Thursday, April 11, 2019

Quickie RPN Routines: HP 42S, DM42, Free 42

Quickie RPN Routines: HP 42S, DM42, Free 42

X, Y refer to their respective stacks and their values

1 + 1 /( 3^(2*X)) + 1/(5^(2*X))

Routine A:
(Labels are omitted for these exercises)

2
*
ENTER
ENTER
3
X <> Y
Y  ↑X
1 / X
X <> Y

X <> Y
Y ↑ X
1 / X
+
1
+
END

Routine B:

2
*
+ / -
3
X <> Y
Y ↑ X
LAST X
5
X <> Y
Y ↑ X
+
1
+
END

Examples:
X:  2.0000,  Result: 1.0139
X:  3.1666,  Result: 1.0010


(X + Y)*(X^2 + Y^2)

Routine A:

ENTER 
X ↑ 2
R ↓
X <> Y
+
LAST X
X ↑ 2
R ↑

*
END

Routine B:

STO ST Z
X ↑ 2
X <> Y
STO + ST Z
X ↑ 2
+
*
END

Examples:
X:  4.0000, Y: 3.0000, Result: 175.0000
X:  2.7000, Y: 3.6000, Result: 127.5750

√(1 + X^2) / √(1 - X^2)

Routine A:

X ↑ 2
1
X <> Y

LAST X
1
+
X <> Y
÷
SQRT
END

Routine B:

X ↑ 2
ENTER
ENTER
1
STO + ST Z
STO - ST Y
R ↓
+ / -
÷
SQRT
END

Examples:
X: 0.5556, Result: 1.3759
X: 0.7278, Result: 1.8035

X / √(X^2 + Y^2)

Routine: 

X ↑ 2 
X <> Y
STO ST Z
X ↑ 2
+
SQRT
÷
END

Examples:
X:  0.5000, Y:  0.7500, Result: 0.5547
X:  1.8080, Y:  1.0220, Result: 0.8705

(X + Y) / (X * Y)

Routine  A:

STO ST Z
X <> Y
STO + ST Z
*
÷
END

Routine B:

ENTER 
R ↓
X <> Y
+
LAST X
R ↑

÷
END

Examples:
X:  5.0000, Y: 4.0000, Result:  0.4500
X:  2.9505, Y: 3.8181, Result:  0.6008

X^Y + Y^X

Routine A:

ENTER
R ↓
X <> Y
Y ↑ X
LAST X
R ↑
Y ↑ X
+
END

Routine B:

ENTER 
R ↓
X <> Y
Y ↑ X
LAST X
R ↑
Y ↑ X
+
END

Examples:
X:  3.9050, Y: 2.7006, Result:  88.0041
X:  4.2650, Y: 4.8750, Result:  2036.6461

Have fun!  See you all next week! 

Eddie

All original content copyright, © 2011-2019.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

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