# The distance between 2 spheres in pendulum

1. Dec 13, 2012

### Dr.Phy

Hi guys,first nice to meet you im new here.Im working on a physic homework and i.ve already done it but i dont know why the x=2lsinx ( x=distance between 2 spheres in pendulum).
(P.S sorry for my bad english,im from Germany). Is that from a trig identity? I think i've understand it but if someone can tell mi with a pic it will be very helpful.

Last edited: Dec 13, 2012
2. Dec 13, 2012

### WillemBouwer

just ad a pic of your problem and also your attemot at a solution and we can figure some solution out