 | Mathematics - 1975 - 1182 pages
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 | Howard Whitley Eves - History - 1983 - 292 pages
...any middle part is equal to the product of the cosines of the two opposite parts. 2. The sine of any middle part is equal to the product of the tangents of the two adjacent parts. (a) By applying each of the above rules to each of the circular parts, obtain the ten formulas used... | |
 | Mathematics - 1984 - 650 pages
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 | Science - 1982 - 850 pages
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II. The sine of the middle part is equal to the product of the cosines of the opposite parts. 
