## NotTim 3 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.

1. NotTim

The equation is$h=4\cos[\pi/6.2t-8]$

2. NotTim

3. LagrangeSon678

is that the given equation

4. NotTim

Yes. I had to figure it out myself, but eventually I came to that.

5. LagrangeSon678

we have to take a look that function

6. NotTim

7. NotTim

I know that in this case, t=2, because of differetn start time.

8. LagrangeSon678

A=4

9. LagrangeSon678

hold on let me work this out

10. LagrangeSon678

okay, we have 12.4 as the period and we have the max depth as 4m at 8 am

11. NotTim

Affirmative?

12. LagrangeSon678

the the min should be at 6.2

13. NotTim

MY value for "b" is pi/6.2.

14. NotTim

15. LagrangeSon678

16. NotTim

yay.

17. LagrangeSon678

im just lost man, let me see if i can get some more help

18. NotTim

Ok. I'm got tons more of these too. Heh.

19. NotTim

Internet timed out. Sorry. Haven't been able to fix that.

20. NotTim

I may be making a consistent error in every calc i do.

21. NotTim

I think I know why. T is not in a bracket with 8. As in (t-8)