His lasting achievement is found in his book Geometria rotundi (1583), where he introduced the trigonometric functions tangent and secant.
Fritz Haber, (1868-1934)
Dusan Hadzi[?], (born 1921), chemist.
Otto Hahn, (1879-1968)
John Haldane[?], British biochemist
Charles Hatchett, (1765-1847), ...
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