## HP-12C

01- 3 21- 1/x
02- / 22- +
03- ENTER 23- 2
04- ENTER 24- /
05- 4 25- -
06- y^x 26- ENTER
07- 12/ 27- ENTER
08- ENTER 28- *
09- ENTER 29- 4
10- * 30- *
11- 1 31- 3
12- 4 32- -
13- 0 33- *
14- / 34- ENTER
15- + 35- ENTER
16- 2 36- *
17- + 37- CHS
18- x<>y 38- 1
19- e^x 39- +
20- ENTER 40- SQRT
41- GTO 00
Usage:
Enter angle in radians ( 0 <= x <= pi )

R/S -> sin(x)

x<>y -> cos(x)

/ -> tan(x)

Examples:

x | sin(x) | cos(x) | tan(x) |
------+-------------+-------------+-------------+
3.14 | 0.001592__545__ |-0.999998732 |-0.001592__547__ |
3.02 | 0.1212932__36__ |-0.99261671__9__ |-0.1221954__39__ |
2.50 | 0.59847214__1__ |-0.80114361__8__ |-0.74702229__0__ |
2.00 | 0.909297427 |-0.41614683__6__ |-2.18503986__9__ |
1.65 | 0.996865028 |-0.0791208__90__ |-12.599264__67__ |
1.58 | 0.99999964__7__ |-0.00920354__5__ |-108.649__1891__ |
1.57 | 0.999999683 | 0.00079632__4__ | 1255.76__9712__ |
1.50 | 0.997494987 | 0.070737__197__ | 14.1014__2097__ |
1.00 | 0.84147098__6__ | 0.54030230__3__ | 1.5574077__35__ |
0.50 | 0.4794255__48__ | 0.8775825__57__ | 0.546302__504__ |
0.05 | 0.049979__231__ | 0.9987502__57__ | 0.0500417__70__ |
0.00 | 0.000000000 | 1.000000000 | 0.000000000 |

x |sin(x*pi/180)|cos(x*pi/180)|tan(x*pi/180)|
------+-------------+-------------+-------------+
180.0 | 0.000000000 |-1.000000000 | 0.000000000 |
179.0 | 0.017452__387__ |-0.99984769__6__ |-0.0174550__45__ |
150.0 | 0.499999998 | 0.86602540__5__ |-0.57735026__5__ |
135.0 | 0.7071067__77__ |-0.70710678__5__ |-0.999999989 |
120.0 | 0.866025404 |-0.500000000 |-1.73205080__7__ |
90.1 | 0.999998477 |-0.0017453__34__ |-572.95__52528__ |
90.0 | 1.000000000 | 0.000000002 | 577350260.0*|
89.9 | 0.999998477 | 0.00174532__6__ | 572.95__81364__ |
60.0 | 0.86602540__3__ | 0.50000000__2__ | 1.732050__799__ |
45.0 | 0.70710678__4__ | 0.7071067__79__ | 1.00000000__6__ |
30.0 | 0.499999999 | 0.866025404 | 0.57735026__8__ |
1.0 | 0.017452__857__ | 0.9998476__87__ | 0.017455__515__ |

(*) tan(90°) = oo

pi = 3.141592654

Formulas:

cos(x) ~ x^4/12 + (x^4/12)^2/140 - cosh(x) + 2

sin(x) = sqrt(1 - (cos(x))^2)

cos(3*x) = cos(x)*(4*(cos(x))^2 - 3)

More details at Mardi Gras Basic Trigs (HP-12C).

## HP 12c Platinum

001- 3 020- 1/x
002- / 021- +
003- ENTER 022- 2
004- ENTER 023- /
005- x^2 024- -
006- x^2 025- ENTER
007- 12/ 026- x^2
008- ENTER 027- 4
009- x^2 028- *
010- 1 029- 3
011- 4 030- -
012- 0 031- *
013- / 032- ENTER
014- + 033- x^2
015- 2 034- CHS
016- + 035- 1
017- x<>y 036- +
018- e^x 037- SQRT
019- ENTER 038- GTO 000
Examples:

x | sin(x) | cos(x) | tan(x) |
------+-------------+-------------+-------------+
3.14 | 0.0015926__28__ |-0.999998732 |-0.0015926__30__ |
3.02 | 0.1212932__39__ |-0.99261671__9__ |-0.1221954__42__ |
2.50 | 0.59847214__3__ |-0.80114361__7__ |-0.74702229__4__ |
2.00 | 0.909297427 |-0.416146837 |-2.185039863 |
1.65 | 0.996865028 |-0.079120889 |-12.599264__79__ |
1.58 | 0.999999646 |-0.009203543 |-108.64920__26__ |
1.57 | 0.999999683 | 0.000796327 | 1255.765__641__ |
1.50 | 0.997494987 | 0.070737202 | 14.1014199__4__ |
1.00 | 0.841470985 | 0.540302306 | 1.557407725 |
0.50 | 0.479425539 | 0.877582562 | 0.546302490 |
0.05 | 0.049979169 | 0.998750260 | 0.050041708 |
0.00 | 0.000000000 | 1.000000000 | 0.000000000 |

x |sin(x*pi/180)|cos(x*pi/180)|tan(x*pi/180)|
------+-------------+-------------+-------------+
180.0 | 0.000000000 |-1.000000000 | 0.000000000 |
179.0 | 0.017452__383__ |-0.99984769__6__ |-0.0174550__41__ |
150.0 | 0.499999997 | 0.86602540__6__ |-0.57735026__4__ |
135.0 | 0.70710678__0__ |-0.70710678__5__ |-1.00000000__3__ |
120.0 | 0.866025404 |-0.500000000 |-1.73205080__6__ |
90.1 | 0.999998477 |-0.00174532__9__ |-572.957__1280__ |
90.0 | 1.000000000 |-2.684678-10 |-3724840447* |
89.9 | 0.999998477 | 0.001745328 | 572.9572__886__ |
60.0 | 0.866025404 | 0.500000000 | 1.732050808 |

(*) tan(90°) = oo