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Math Help - Solving for an inequality

  1. #1
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    Unhappy Solving for an inequality

    Hi,

    I have a question which I've been trying to solve for a couple of hours now. Any help would be grateful appreciated:

    Please help me solve this inequality:

    cos 3x ≤ 1.2x - 1.9

    with x in radians. Write your answer using interval notation, with values rounded to decimal places.

    How do I do this???
    Thank you
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  2. #2
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    Quote Originally Posted by ajaxanon View Post
    Hi,

    I have a question which I've been trying to solve for a couple of hours now. Any help would be grateful appreciated:

    Please help me solve this inequality:

    cos 3x ≤ 1.2x - 1.9

    with x in radians. Write your answer using interval notation, with values rounded to decimal places.

    How do I do this???
    by using technology, because you're not going to be able to do it by hand using elementary algebraic methods.

    intervals where \cos(3x) \le 1.2x-1.9 are [0.8678,1.5624] and [2.2846,\infty)
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