1. The problem statement, all variables and given/known data I have been puzzling over this question for hours now. The centre of a wall clock is 180 cm above the floor. The hand of the clock that indicates the seconds is 20 cm long. The height, h cm above the floor, of the tip of the second hand, t seconds after midday, is given by an equation of the form: h(t)= a sin n (t+b) + c where a, b, c and n are positive real constants. 2. Relevant equations I'm required to find what the value of the four constants is. 3. The attempt at a solution I know that a=20 and c=180, but I'm not sure about n and c. Would it be correct if I assume that the period is 60 seconds. Therefore, to find n: 60=2[tex]\pi[/tex][tex]/[/tex]n n=[tex]\pi[/tex][tex]/[/tex]30 And to find c, is it right if I take t=0 and substitute all the values I've got of a, c, and n into the equation h(t)= a sin n (t+b) + c ? Also, what's the significant of the word midday? Am I supposed to take it as the start of the period? I feel really stupid for not understanding. I would really appreciate any help given, I'm at my wits end. Please?