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#1 2007-11-13 05:01:55
- tony123
- Member
- Registered: 2007-08-03
- Posts: 229
prove
sin 25°.sin 35°.sin 60°.sin 85°=sin 20°.sin 40°.sin 75°.sin 80°.
Last edited by tony123 (2007-11-13 05:02:27)
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#2 2008-01-12 08:59:48
- JaneFairfax
- Member
- Registered: 2007-02-23
- Posts: 6,868
Re: prove
A couple of ingenious solutions here: http://www.artofproblemsolving.com/Foru … p?t=182771
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