math help

Out of context: Reply #28

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  • monNom0

    If you're looking for the slope (angle) you need trigonometry, not pythagorus.

    a^2 + b^2 = c^2 gives you the length of the hypotenuse (long side)

    trig will calculate the angle:

    cosine of angle = opposite/adjacent

    on a calculator you would go: opposite/adjacent = 72/120 = 0.6

    the inverse cosine of 0.6
    = 53.13deg

    of course stairs they usually just say 12 over 8 or whatever and don't bother with the actual angle.

    monNom 0Permalink
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    • actually I think I fucked that up,.. shows how much I use trig!monNom
    • should be Tangent. not Cosine.
      angle is 30.964      monNom
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