# Quick question

• Aug 19th 2007, 06:38 AM
polymerase
Quick question
At point big blue, the high tides reach 1.5 metres and the low tides are 0.3 metres. Suppose that high tide occured at 3pm. Using a period of 12 hours, predict how high the tides will be at midnight.
• Aug 19th 2007, 07:21 AM
CaptainBlack
Quote:

Originally Posted by polymerase
At point big blue, the high tides reach 1.5 metres and the low tides are 0.3 metres. Suppose that high tide occured at 3pm. Using a period of 12 hours, predict how high the tides will be at midnight.

$
h(t)=0.6~\cos(2 \pi (t-3)/12)+0.9
$

$t$ in hours from 12 noon.

RonL
• Aug 19th 2007, 07:37 AM
rualin
or $h(t)=0.6~\sin{\left(\frac{\pi t}{6}\right)}+0.9$