The distance between 2 spheres in pendulum

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The discussion revolves around understanding the formula x = 2l sin(x) in the context of the distance between two spheres in a pendulum setup. The original poster seeks clarification on whether this equation is derived from a trigonometric identity. Participants are encouraged to share visual aids or diagrams to facilitate understanding. The conversation emphasizes collaborative problem-solving in physics homework. Clear explanations and illustrations are requested to enhance comprehension of the topic.
Dr.Phy
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Hi guys,first nice to meet you I am new here.Im working on a physics homework and i.ve already done it but i don't 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.
 
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just ad a pic of your problem and also your attemot at a solution and we can figure some solution out
 

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