3297. In Defence of sin A + sin B + sin C = 4 cos ½A cos ½B...

3297. In Defence of sin A + sin B + sin C = 4 cos ½A cos ½B cos ½C

William Wynne Willson
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Volume:
55
Language:
english
Journal:
The Mathematical Gazette
DOI:
10.2307/3613325
Date:
February, 1971
File:
PDF, 206 KB
english, 1971
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