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Math Help - Litle equation

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

    Solve in R :  \sin x + 2\sin (2x) = 3 + \sin (3x)
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  2. #2
    Senior Member pacman's Avatar
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    Solution in R? Take a look at the 2nd graph, the red one is the right side of the equation, and the blue one for the left hand side. They don't intersect, it means no real solution. sin x + 2sin 2x = 3 + sin 3x

    For the 1st graph, you will see that it never touches the x-axis . . . . same results. sin x + 2sin 2x - sin 3x - 3 = 0

    Attached Thumbnails Attached Thumbnails Litle equation-2nd.gif   Litle equation-.gif  
    Last edited by pacman; August 22nd 2009 at 02:43 AM.
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  3. #3
    Super Member dhiab's Avatar
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    Quote Originally Posted by pacman View Post
    Solution in R? Take a look at the 2nd graph, the red one is the right side of the equation, and the blue one for the left hand side. They don't intersect, it means no real solution. sin x + 2sin 2x = 3 + sin 3x

    For the 1st graph, you will see that it never touches the x-axis . . . . same results. sin x + 2sin 2x - sin 3x - 3 = 0

    Thank you have you any algebrique solution?
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