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    Solve (1+cosx)^2=1/2 for -180 <x <180
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    (Original post by ramshahk)
    Solve (1+cosx)^2=1/2 for -180 <x <180
    How would you isolate the cosx term?
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    (Original post by an_atheist)
    How would you isolate the cosx term?
    Square root it? Im not sure
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    (Original post by ramshahk)
    Square root it? Im not sure
    Yes. You square root it.
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    (Original post by an_atheist)
    Yes. You square root it.
    Then
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    (Original post by ramshahk)
    Then
    What do you think? Write it out.
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    (Original post by an_atheist)
    What do you think? Write it out.
    Yes I've done that
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    (Original post by ramshahk)
    Yes I've done that
    And what are you left with?
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    (Original post by an_atheist)
    And what are you left with?
    1+cos= square root 1/2
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    (Original post by ramshahk)
    1+cos= square root 1/2
    And how do you isolate cosx from there?
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    I would expand the bracket, then bring the 1/2 to the other side and put the equation =0. You then have a quadratic to solve
 
 
 
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