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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.

Mathematics
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The equation is\[h=4\cos[\pi/6.2t-8]\]
My answer is 3.0505. The correct answer is 2.1
is that the given equation

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Other answers:

Yes. I had to figure it out myself, but eventually I came to that.
we have to take a look that function
What about?
I know that in this case, t=2, because of differetn start time.
A=4
hold on let me work this out
okay, we have 12.4 as the period and we have the max depth as 4m at 8 am
Affirmative?
the the min should be at 6.2
MY value for "b" is pi/6.2.
Wadda bout my textbook?
your right
yay.
im just lost man, let me see if i can get some more help
Ok. I'm got tons more of these too. Heh.
Internet timed out. Sorry. Haven't been able to fix that.
I may be making a consistent error in every calc i do.
I think I know why. T is not in a bracket with 8. As in (t-8)

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