# Math Help - Trigonometric Equations

1. ## Trigonometric Equations

A boat tied up at a dock bobs up and down with passing waves. The vertical distance between its high point and its low point is 1.8m and the cycle is repeated every 4s. Determine a sinucosial equation to model the vertical position, in metres, of the boat versus the time, in seconds. Help Please, Thanks. =)

2. Originally Posted by Hellooo
A boat tied up at a dock bobs up and down with passing waves. The vertical distance between its high point and its low point is 1.8m and the cycle is repeated every 4s. Determine a sinucosial equation to model the vertical position, in metres, of the boat versus the time, in seconds. Help Please, Thanks. =)
you are given the period and enough info to find the amplitude of motion ...

$y = A\cos(Bt)$

what's next ?