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Math Help - Solve for theta

  1. #1
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    Solve the equation for (theta) if
    0deg <or= (theta) <or= 360deg

    5sin^2(theta) - 3sin(theta) = 2

    Give the answer in degrees. If rounding is necessary, round to the nearest tenth of a degree.

    I dont even know were to begin on this, any help or advice would be greatly appreciated!
    Thanks


    I will get some extra credit if I can get the solution to this problem in the next 3 hours, I am a Computer Science major and my math skills are weak. This would really help me out and I would owe you a big one to anyone with a answer~Thanks again
    Last edited by mr fantastic; April 9th 2009 at 04:52 AM. Reason: Merged post
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  2. #2
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    Quote Originally Posted by ozweego5 View Post
    Solve the equation for (theta) if
    0deg <or= (theta) <or= 360deg

    5sin^2(theta) - 3sin(theta) = 2

    Give the answer in degrees. If rounding is necessary, round to the nearest tenth of a degree.

    I dont even know were to begin on this, any help or advice would be greatly appreciated!
    Thanks
    Hi ozweego5,

    Try factoring.

    5\sin^2 \theta-3\sin \theta -2=0

    (5\sin \theta+2)(\sin \theta-1)=0

    5\sin \theta+2=0 \ \ or \ \ \sin \theta -1=0

    Can you finsh?
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  3. #3
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    ok I will see what I can come up with and give you my answer in a couple mins......THANK YOU


    would I just solve algebraically? and say
    Sin= -2/5 or Sin= 1

    ???????
    Last edited by mr fantastic; April 9th 2009 at 04:53 AM. Reason: Merged posts
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  4. #4
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    Quote Originally Posted by ozweego5 View Post
    I will get some extra credit if I can get the solution to this problem in the next 3 hours, I am a Computer Science major and my math skills are weak. This would really help me out and I would owe you a big one to anyone with a answer~Thanks again
    If this question counts towards your final grade then it is not appropriate for MHF to help you with it. Especially since it's for extra credit ....

    Thread closed (you can pm me to discuss this).
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