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Course 30189: Maths21A Summer 2009
Multivariable Calculus
Al Kashi
Office: SciCtr 434

Al Kashi

The law of cosines is in France also called Al Kashi theorem. Here are some links to this mathematician In my copy of "Katz" book, I did not find the claim substantiated that Al Kashi had proven a version of the cos theorem but I keep looking for sources. Here are scans of that book showing the relevant pages on Al Kashi:

Please send questions and comments to maths21a@fas.harvard.edu
Maths21A | Oliver Knill | Summer 2009 | Summer school | Department of Mathematics | Faculty of Art and Sciences | Harvard University QR code of this page