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-   -   Tan B= 0.1, what is angle B? (https://www.askmehelpdesk.com/showthread.php?t=275986)

  • Nov 1, 2008, 12:42 PM
    wallrus75
    tan B= 0.1, what is angle B?
    So I am starting a new section. I don't really get this tan stuff but here is the situation

    There is a example.

    Example: tan A=0.25
    Answer: Angle A=14.036 degrees

    If I type in solve(tan(x)=0.25,x) into my calculator, it just comes up with a lot of random numbers.

    But...

    If I type in solve(tan(14.036)=x,x) it gets about 0.25. Why is it that I can do it one way but not the other way?

    So if I have tan B=0.1, how could I find out angle B?

    Thanks for the help:)
  • Nov 2, 2008, 08:31 PM
    Credendovidis
    It all depends on how your calculator is set to accept you entering the data.
    See the operation manual of your calculator.
    .
    ... solve(tan(14.036)=x,x) it gets about 0.25.
    That works because tan is an angle function, i.e. of the "A=14.036 degrees".

    ... solve(tan(x)=0.25,x)...
    And here you ask the calculator to solve tan from tan...

    Find in the calculators manual how to solve the angle from tan.

    Success

    :)
  • Nov 3, 2008, 01:22 AM
    basilrazi

    from my casio fx-100AU calculator you type in:

    SOLVING TAN B = 0.1
    SHIFT TAN (it gives tan^-1) then key in 0.1

    you get 5.710593138

    now press the degree,minute, second key and you get 5'42'38.14'
    this means B = 5 degrees, 42 minutes, 38.15 seconds

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