...Hipparchus was also the inventor of trigonometry, both plane and spherical...
George Forbes 「History of Astronomy」
...He invented the sciences of plane and spherical trigonometry, and wasthe first to use right ascensions and declinations...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
便利!手書き漢字入力検索
この漢字は何でしょう??