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robinkss

  • 2 years ago

if you are trying to find an angle and you only have this equation, 3x-14, how do you solve

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  1. theEric
    • 2 years ago
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    Well, that's actually an expression, not an equation. An equation needs equal expressions, like\[y=3x-14\]I assume that the angle you want to know is on the graph of \(y=3x-14\). Does that seem right, so far?

  2. robinkss
    • 2 years ago
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    yes

  3. theEric
    • 2 years ago
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    Alright, now, have you learned trigonometric functions yet?

  4. robinkss
    • 2 years ago
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    not yet

  5. theEric
    • 2 years ago
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    Is this a question for class, or is it your own curiosity? I might have to research another way to get the angle than I had thought of using earlier.

  6. robinkss
    • 2 years ago
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    this is homework from summer

  7. theEric
    • 2 years ago
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    And you don't know about the tangent a.k.a. \(tan\) function?

  8. robinkss
    • 2 years ago
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    no

  9. theEric
    • 2 years ago
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    Well, I guess we might as well look at the graph.|dw:1374722124721:dw|I'm not sure which angle the question wants, but I assume it's the angle of the line measured from the x-axis and you would use the tangent function. Maybe I can find others to help us... With the tangent function, you use the equation \(tan^{-1}(m)=\theta\) where \(m\) is your slope and \(\theta\) is its angle.

  10. robinkss
    • 2 years ago
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    ok

  11. robinkss
    • 2 years ago
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    nevermind

  12. theEric
    • 2 years ago
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    I would imagine you are, especially if you never used the tangent function! But I don't know any other way!

  13. Hero
    • 2 years ago
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    Alternatively you can just use a protractor and graph paper.

  14. theEric
    • 2 years ago
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    Ahhhhhh.... I seeee.... So, measuring, not calculating. I think I remember doing that before, too.

  15. robinkss
    • 2 years ago
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    oh so instead of finding y you just measure from what x is?

  16. theEric
    • 2 years ago
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    So you'll need to have grid paper, so your line is straight and your axes are perpendicular and everything is accurate. Then you can measure the line accurately. Thank you, @Hero !

  17. theEric
    • 2 years ago
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    |dw:1374722785269:dw|

  18. theEric
    • 2 years ago
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    Do you have grid paper and a protractor?

  19. robinkss
    • 2 years ago
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    ya and i think i got it thank you @theEric

  20. theEric
    • 2 years ago
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    Sweet. Just set up the protractor along the \(x\)-axis (or at least parallel to the \(x\)-axis) and have that point on the line. Good luck :)

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