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need some math help real quick

Discussion in 'Members' Lounge' started by Dustin_m, Apr 27, 2006.

  1. Dustin_m

    Dustin_m Active Member

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    alright well its been almost 4 years since i took trig which was the last math i had to take. now i need to solve a problem and can't remember this shit.

    i got a right triangle that measures 10', 32', and the hypotenuse is 33.56', i need to find what the smaller of the other two angles is.
     
  2. pills_PMD

    pills_PMD Super Moderator

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    sin theta = opposite / hypotenuse

    cos theta = adjacent / hypotenuse

    tan theta = opposite / adjacent



    tan^-1(10/32) = 17.354 deg

    180 - 90 - 17.354 = 72.646 deg

    those are your angles
     
  3. JDMPlaya

    JDMPlaya Senior Member

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    wow.. i never took anything more than algebra :) I hate math
     
  4. Dustin_m

    Dustin_m Active Member

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    thanks. yea i remembered that first part because back in H.S. they taught us to remember it as SOH CAH TOA, like if you sound that out. if you remember that little saying you can figure out which sides of the triangle to use for each one. i just couldn't remember how to figure out the actual problem.

    now how would i figure out what one of the sides of the triangle is if you have the same angles but i don't know the hypotenuse or the short side of the triangle but i know the long side is 160'?

    the long side of that last one was 32 and 160/32=5, so would the other side be 50? sounds dumb but i have been up all night and can't think right now
     
  5. CRX-YEM

    CRX-YEM Super Moderator Moderator VIP

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    I've got a better way to remeber it

    Sin Cos Tan

    Oscer
    Has

    A
    Hairy

    Oval
    Ass

    apply sin cos and tan to the the two pairs respectively
     
  6. Dustin_m

    Dustin_m Active Member

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    [​IMG]
     
  7. pills_PMD

    pills_PMD Super Moderator

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    oscar had a hit of acid is how i remember
     
  8. pills_PMD

    pills_PMD Super Moderator

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    with the same angles and knowing one side....

    . |
    . S | \
    . |____________angle__\
    . L


    to find short side (S):
    L * tan(angle) = S

    L^2 + S^2 = hypotenuse^2

    well fuck that didn't work so well.. but you get the idea...
     
  9. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Eww. I hate all those "this is how you remember it" phrases. I just remember what they all actually stand for and I'm fine. :)
     
  10. pills_PMD

    pills_PMD Super Moderator

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    yea but you are asian... you have an internal calculator and can find determinants of 6x6 matrices in your head.
     
  11. JDMPlaya

    JDMPlaya Senior Member

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  12. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Yup, it's just part of our genetic code. I do have to go to TI and HP every year for a firmware upgrade though. [​IMG]
     
  13. pills_PMD

    pills_PMD Super Moderator

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    haha..
    the asians here are killin me... they remember every bit of math they ever learned.. like i had to go back and re-learn probabilities and shit for this diffusion course i'm in.. they knew it off the top.. they are nuts.
     
  14. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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