You will have to do better than that to get homework help.
If you plot the data (XY plot) you will see a sine wave.
Were the measurements made every second, every 1/10 of second.....?
What exactly do you want to find - the length of the pendulum, the value of
g ?
You have not given us enough data.
The sine function in Excel is =SIN(A1) bit if A1 has degrees you need
=SIN(RADIANS(A1))
best wishes
--
Bernard Liengme
Microsoft Excel MVP
http://people.stfx.ca/bliengme



"Matt" wrote in message
...
Hi,
I currently have a set of data for a pendelum, resembeling a sin function.
What functions or equations in excell can I use to find the sin function
representing this pendelum using my data?

Thanks!