hp HP-41C

USER GRAD RAD f g ENTRY

T0.0000

Z0.0000

Y0.0000

X0.0000

yˣ

SUM

NPV

yˣ

1/x

IRR

x²

√x

PMT

10ˣ

LOG

PV

eˣ

LN

FV

%

x≷y

%CH

R↑

R↓

%T

SIN⁻¹

SIN

→HMS

COS⁻¹

COS

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TAN⁻¹

TAN

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f

g

M+

STO

SDEV

M-

RCL

MEAN

CLST

CLx

CLx

LST x

ENTER

n!

ABS

CHS

COMB

π

EEX

PERM

CLx

←

INT

x²

7

FRAC

SIN⁻¹

8

RND

COS⁻¹

9

→RAD

MOD

÷

1/Δ%

TAN⁻¹

4

SGN

x√y

5

MAX

yˣ

6

MIN

%CH

×

GEOM

→HMS

1

ALOG

→HR

2

XROOT

→RAD

3

HYPOT

Re≷Im

−

Δ%

10ˣ

0

→DEG

π

.

SEED

ABS

x²

x̄w

x̄

+

Σx²