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The subject says it all really. Skytopia (talk) 08:53, 31 December 2007 (UTC)Reply[reply]

Looks as though it has been updated - cheers to whoever it was. However, there may be a slight error in the "Inverse Transformation" section. Please see this page to confirm that Wikipedia's "cos(sigma) = (-d1^2 - d2^2 + 4*a^2)/(2*d1*d2)" is not correct.

I also recommend using ACOS on the right hand side of the equation, instead of COS on the left hand side. --Skytopia (talk) 04:25, 27 February 2008 (UTC)Reply[reply]

Disappointed with the clarity of this article. The diagrams need to show the parameters and without this it looks like no one has checked if the argument can be followed. Temperance007 (talk) 11:39, 28 February 2010 (UTC)Reply[reply]