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NotTim

  • 4 years ago

At an ocean port, the water has a max depth of 4m above the mean level at 8 A.M, and the period is 12.4h. Find the depth of the water at 10 A.M.

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  1. NotTim
    • 4 years ago
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    The equation is\[h=4\cos[\pi/6.2t-8]\]

  2. NotTim
    • 4 years ago
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    My answer is 3.0505. The correct answer is 2.1

  3. LagrangeSon678
    • 4 years ago
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    is that the given equation

  4. NotTim
    • 4 years ago
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    Yes. I had to figure it out myself, but eventually I came to that.

  5. LagrangeSon678
    • 4 years ago
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    we have to take a look that function

  6. NotTim
    • 4 years ago
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    What about?

  7. NotTim
    • 4 years ago
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    I know that in this case, t=2, because of differetn start time.

  8. LagrangeSon678
    • 4 years ago
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    A=4

  9. LagrangeSon678
    • 4 years ago
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    hold on let me work this out

  10. LagrangeSon678
    • 4 years ago
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    okay, we have 12.4 as the period and we have the max depth as 4m at 8 am

  11. NotTim
    • 4 years ago
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    Affirmative?

  12. LagrangeSon678
    • 4 years ago
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    the the min should be at 6.2

  13. NotTim
    • 4 years ago
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    MY value for "b" is pi/6.2.

  14. NotTim
    • 4 years ago
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    Wadda bout my textbook?

  15. LagrangeSon678
    • 4 years ago
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    your right

  16. NotTim
    • 4 years ago
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    yay.

  17. LagrangeSon678
    • 4 years ago
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    im just lost man, let me see if i can get some more help

  18. NotTim
    • 4 years ago
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    Ok. I'm got tons more of these too. Heh.

  19. NotTim
    • 4 years ago
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    Internet timed out. Sorry. Haven't been able to fix that.

  20. NotTim
    • 4 years ago
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    I may be making a consistent error in every calc i do.

  21. NotTim
    • 4 years ago
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    I think I know why. T is not in a bracket with 8. As in (t-8)

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