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Math Help - Critical equation

  1. #1
    Super Member dhiab's Avatar
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    Critical equation

    solve in R this equation :
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  2. #2
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    Quote Originally Posted by dhiab View Post
    solve in R this equation :
    Hint: \cos{(2x)} = 2\cos^2{x} - 1 and \cos{(3x)} = 4\cos^3{x} - 3\cos{x}.


    Substitute these values appropriately and you should be able to solve the equation.
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