# Math Help - Quick question

1. ## 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.

2. 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

3. or $h(t)=0.6~\sin{\left(\frac{\pi t}{6}\right)}+0.9$