## 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 | 0.001592545|-0.999998732 |-0.001592547|

3.02 | 0.121293236|-0.992616719|-0.122195439|

2.50 | 0.598472141|-0.801143618|-0.747022290|

2.00 | 0.909297427 |-0.416146836|-2.185039869|

1.65 | 0.996865028 |-0.079120890|-12.59926467|

1.58 | 0.999999647|-0.009203545|-108.6491891|

1.57 | 0.999999683 | 0.000796324| 1255.769712|

1.50 | 0.997494987 | 0.070737197| 14.10142097|

1.00 | 0.841470986| 0.540302303| 1.557407735|

0.50 | 0.479425548| 0.877582557| 0.546302504|

0.05 | 0.049979231| 0.998750257| 0.050041770|

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 | 0.017452387|-0.999847696|-0.017455045|

150.0 | 0.499999998 | 0.866025405|-0.577350265|

135.0 | 0.707106777|-0.707106785|-0.999999989 |

120.0 | 0.866025404 |-0.500000000 |-1.732050807|

90.1 | 0.999998477 |-0.001745334|-572.9552528|

90.0 | 1.000000000 | 0.000000002 | 577350260.0*|

89.9 | 0.999998477 | 0.001745326| 572.9581364|

60.0 | 0.866025403| 0.500000002| 1.732050799|

45.0 | 0.707106784| 0.707106779| 1.000000006|

30.0 | 0.499999999 | 0.866025404 | 0.577350268|

1.0 | 0.017452857| 0.999847687| 0.017455515|(*) 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 | 0.001592628|-0.999998732 |-0.001592630|

3.02 | 0.121293239|-0.992616719|-0.122195442|

2.50 | 0.598472143|-0.801143617|-0.747022294|

2.00 | 0.909297427 |-0.416146837 |-2.185039863 |

1.65 | 0.996865028 |-0.079120889 |-12.59926479|

1.58 | 0.999999646 |-0.009203543 |-108.6492026|

1.57 | 0.999999683 | 0.000796327 | 1255.765641|

1.50 | 0.997494987 | 0.070737202 | 14.10141994|

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 | 0.017452383|-0.999847696|-0.017455041|

150.0 | 0.499999997 | 0.866025406|-0.577350264|

135.0 | 0.707106780|-0.707106785|-1.000000003|

120.0 | 0.866025404 |-0.500000000 |-1.732050806|

90.1 | 0.999998477 |-0.001745329|-572.9571280|

90.0 | 1.000000000 |-2.684678-10 |-3724840447* |

89.9 | 0.999998477 | 0.001745328 | 572.9572886|

60.0 | 0.866025404 | 0.500000000 | 1.732050808 |(*) tan(90°) = oo

_{Edited by mistake. No changes.}

*Edited: 1 Apr 2013, 2:48 p.m. after one or more responses were posted*