Packing Circles around Circle, Why Doesn't This Formula Work?

 From: OSTexo 9 Jun 2015  (1 of 6)
 Hello, I'm attempting to exactly pack smaller circles around a larger circle, and to get the radius of the outer circle I found this formula online with explanation: http://mathforum.org/library/drmath/view/63736.html When I enter this formula in a calculator I get a proper numerical result, however when I start the circle command in MoI and enter the formula this way for example, where I want to get the radius of ten small circles around the larger center circle with a radius of 20: 20 sin(180/10)/(1 - sin(180/10)) I get no result. Is this just a matter of syntax not being correct? There is still some manual labor required to place the smaller circles around the larger one, but that is simply a matter for the Circular Array since the formula solves for the number of specified circles. Thanks.

 From: Michael Gibson 9 Jun 2015  (2 of 6)
 7441.2 In reply to 7441.1 Hi OSTexo, it looks like you are missing an operator after the "20" part, here: code:20 sin(180/10)/(1 - sin(180/10)) ^ If that's meant to be a multiplication you'll have to put in a * symbol at that point, basically for computer code math formulas anytime you want a multiplication you have to use the * symbol, it won't work to just stick things next to each other like it is in regular math formulas. So for example you can't write: 5(x-1) you have to write: 5*(x-1). Hope that helps! - Michael

 From: Max Smirnov (SMIRNOV) 9 Jun 2015  (3 of 6)
 7441.3 In reply to 7441.1 20Ă—sin(180/10)/(1-sin(180/10)) = 8,944271909999 Everything is correct. Are you using radians or degrees?