Sunday
April 19, 2015

Homework Help: Trigonometry..

Posted by Lg on Saturday, June 15, 2013 at 4:38pm.

During high tide the water depth in a harbour is 22 m and during low tide it is 10m(Assume a 12h cycle).
Calculate the times at which the water level is at 18m during the first 24 hours.

My solution:
first I found the cos equation: H(t)=-6cos(π/6t)+16
then..
Let π/6t=Θ
18=-6cosΘ+16
18-16=-6cosΘ
Θ=1.230959417


Then I don't know what's next....

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Members