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Thread: another trig equation

  1. February 11th 2011, 06:27 AM #1
    kassums17
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    another trig equation

    2sin squared thaata + 3cos thaata - 3 = 0

    solve the equation please!
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  2. February 11th 2011, 06:45 AM #2
    Ackbeet
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    Assuming you mean

    2\sin^{2}(\theta)+3\cos(\theta)-3=0,

    I would use \sin^{2}(\theta)+\cos^{2}(\theta)=1 to change the first term into cosines, and then use the quadratic formula. What does that give you?
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