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Forum URL: http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name: This and that
Topic ID: 985
Message ID: 9
#9, RE:
Posted by alexb on Mar-12-11 at 06:42 PM
In response to message #8
> Does this qualify as yet another proof, or too close to proof 6?

Do not know what other could say. Far as I am concerned, for this proof you do not even need trigonomentry. IMHO, the use of sine and cosine is entirely accidental and redundant.