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Math Help - Trig Equations

  1. #1
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    Trig Equations

    How would you solve cos^2(x) = 1/4
    please and thank you...
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by CenturionMonkey View Post
    How would you solve cos^2(x) = 1/4
    please and thank you...
    \cos^2 x = \frac 14 \implies \cos x = \pm \frac 12 now what values of x cause that to happen?
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  3. #3
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    how would you go about solving

    tan2(x) = 8cos^2(x) - cot(x), domain is 0 to 360

    please help...
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by CenturionMonkey View Post
    how would you go about solving

    tan2(x) = 8cos^2(x) - cot(x), domain is 0 to 360

    please help...
    begin by changing everything to sines and cosines and see where you can go from there
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  5. #5
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    hey thanks, but actually i got it a different way, i was doing some simple multiplication wrong. lol. I hate how when you're doing something challenging you tend to undermine the simple stuff. heh.
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