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Math Help - Help to isolate θ

  1. #1
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    Help to isolate θ

    Isolate θ

    cos 2θ = cos y cos x

    I have no clue where to start, some help would be great.

    Nvm i figured it out
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  2. #2
    Master Of Puppets
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    Take inverse \cos of both sides then divide by 2.

    What do you get?
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