February 22, 2017

Homework Help: Trig

Posted by HELP on Monday, March 5, 2012 at 10:13pm.

Please help. I can't get this problem at all.
When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees.

Show that the radius r of the common face is given by r=ab/a-b.

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