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Math Help - trig problems

  1. #1
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    trig problems

    so i have a trigonmetry question like this Tetha = -31 pie/6 , lol not sure do understand it, but my teacher ask us to graph this on a y = xin(theta) , y = cos(theta).
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by lickman View Post
    so i have a trigonmetry question like this Tetha = -31 pie/6 , lol not sure do understand it, but my teacher ask us to graph this on a y = xin(theta) , y = cos(theta).
    x \in \theta makes no sense. \theta is not an interval.

    if given \theta and you are asked to graph y = \cos \theta, then this is simply graphing a constant. it is a horizontal line passing through \cos \theta on the y-axis
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  3. #3
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    my bad typo , y = sin(theta), and that is how do i plot -31 (pie)/6 on that graph. like i serious need help
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by lickman View Post
    my bad typo , y = sin(theta), and that is how do i plot -31 (pie)/6 on that graph. like i serious need help
    ok, this is what your professor means, it seems

    graph the sine and cosine function. then, on the x-axis, locate the point \frac {-31 \pi}6, then, trace a vertical line to your graph, then a horizontal line from where it hits the graph to the y-axis. the value you get on the y-axis is (or should be, if you draw to scale reasonably well) the value of the function at the said x-value
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  5. #5
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    the question is how do i trace it to locate -31 (radius)/6, lol sry for previous questions, i understand that radius/6 is a 30 degree and that each radius has 6 slices in it. and one whole pie is 12. so can u clearify what my prof has said or try to explain it in a different way.
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