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Math Help - trigonometry

  1. #1
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    trigonometry


    please help! i need to know about trigonometry as i do not get the sin, cos and tan...
    what does it mean, how do i get it and when od i imply it? thanks a bunch! (no sarcasm)


    graffitixgirl
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by Graffitixgirl View Post

    please help! i need to know about trigonometry as i do not get the sin, cos and tan...
    what does it mean, how do i get it and when od i imply it? thanks a bunch! (no sarcasm)


    graffitixgirl
    Code:
      |\
      |  \
    A |   \   C
      |    \
      |___x_\
         B

    The best thing to do will be to post the problems here that you are struggling with, but I can fill you in on the basics.

    Observe the triangle above.

    C is the hypotenuse of the triangle, and x is the angle opposite side A.

    Sin

    The sin of an angle is equal to the side opposite the angle, divided by the hypotenuse.

     sin x = \frac{Opp}{Hyp} = \frac{A}{C}

    Cos

    The cos of an angle is equal to the side adjacent to the angle, divided by the hypotenuse.

     cos x = \frac{Adj}{Hyp} = \frac{B}{C}

    Tan

    The tan of an angle is equal to the side opposite the angle, divided by the adjacent angle.

     tan x = \frac{Opp}{Adj} = \frac{A}{B}


    You have to know these identities by heart.

    Post questions of specific problems you do not understand too.
    Last edited by janvdl; April 11th 2008 at 01:19 AM. Reason: Goodness knows how Soroban gets those [ code ] things to look so nice...
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