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Math Help - Simultaneous Equations

  1. #1
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    Simultaneous Equations

    Hey i've come across the following two equations and was just wodering if I could get some help solving them.

    (1) 578cos(40) - x - xcos(y) = 0
    (2) 578sin (40) - xsin(y) = 0

    All help appriciated. Thanks.
    Last edited by holmesb; April 6th 2009 at 08:05 PM.
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  2. #2
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    Quote Originally Posted by holmesb View Post
    Hey i've come across the following two equations and was just wodering if I could get some help solving them.

    (1) 578cos(40) - x - xcos(y) = 0
    (2) 578sin (40) - w=xsin(y) = 0

    All help appriciated. Thanks.

    Is this supposed to be an equal sign?
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  3. #3
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    Hello, holmesb!

    I don't suppose you LOOKED at what you posted.

    What you wrote makes no sense!


    I have a guess about what you meant, but I'll wait for your response.
    (I won't hold my breath.)

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  4. #4
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    Sorry about that. Had little time to whip this up. Ok.

    The question should have read:


    (1) 578cos(40) - x - xcos(y) = 0
    (2) 578sin (40) - xsin(y) = 0
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  5. #5
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    Quote Originally Posted by holmesb View Post
    Hey i've come across the following two equations and was just wodering if I could get some help solving them.

    (1) 578cos(40) - x - xcos(y) = 0
    (2) 578sin (40) - xsin(y) = 0

    All help appriciated. Thanks.
    I would probably look at each equation and make the the subject.

    (1) x = 578cos(40)/(1+cos(y))

    (2) x = 578sin(40)/sin(y)

    Then making 578cos(40)/(1+cos(y)) = 578sin(40)/sin(y)

    You now only have one variable. now re-arrange to elimate

    578cos(40) and 578sin (40) and you should have

    tan(40) = sin(y)/(1+cos(y))

    From here you should try and find some funky trig identityto seal the deal.
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