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Well the units are right. How about the limits. When tex2html_wrap_inline673 is 90 degrees, then each rope supports half of the weight which seems right. How about as tex2html_wrap_inline725 ? The tensions go to infinity! That means its impossible to support any weight at all when the two strings are totally horizontal. This is actually true. It's a good thing to see if this agrees with your intuition.

Joshua Deutsch
Wed Jan 7 17:12:17 PST 1998