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Math Help - Find the Coordinates of the points on the curve

  1. #1
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    Find the Coordinates of the points on the curve

    Find the coordinates of the points on the curve y = 2x - 3x - 13x +2 at which the tangents to the curve make angles of 135* with the positive sense of the x axis.

    edit: I can differentiate the first part and get the slope, 6x - 6x -13 and solve for x, but I don't get what I am supposed to do with the 135* angle part, I get that the x will be positive but do I just solve for x . Could someone explain the 135* angle part?
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  2. #2
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    I see that you have over ten postings.
    By now you should understand that this is not a homework service
    So you need to either post some of your work on a problem or explain what you do not understand about the question.
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  3. #3
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    One of the first things you should have learned about "slope" is that the slope of a line is the tangent of the angle the line makes with the x-axis. If the line makes an angle of 135 degrees, then the slope is tan(135). 135 is, by the way, 90+ 45 so you should not have to use a calculator.
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