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Math Help - Trouble with a problem consisting of find the rule of a sine function

  1. #1
    s3a
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    Trouble with a problem consisting of find the rule of a sine function

    I am stuck on e). I also don't understand what values 5:00 AM and 5:00 PM are on the x axis. Are they 5 and 17? Please help!
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  2. #2
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    minimum tide is 10m and maximum is 22m, so therefore the mean is 16m.

    So to get the corresponding times you need to solve f(x) = 16. I am assuming you have already calculated a, b and k correctly.

    And yes in 24hr hour time, 5am = 05:00 and 5pm = 17:00.
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  3. #3
    s3a
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    Quote Originally Posted by nzmathman View Post
    minimum tide is 10m and maximum is 22m, so therefore the mean is 16m.

    So to get the corresponding times you need to solve f(x) = 16. I am assuming you have already calculated a, b and k correctly.

    And yes in 24hr hour time, 5am = 05:00 and 5pm = 17:00.
    When I make f(x)=16, I do that because I want to find the x value for when y is 16 =(h,k)?
    And what x value do I assign when assigning a y value of 16 becayse I am stuck with two unknowns (x and h).
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