History
Spherical trigonometry was studied by early Greek mathematicians such as Menelaus of Alexandria, who wrote a book on spherical trigonometry called Sphaerica and developed Menelaus' theorem.
Read more about this topic: Spherical Geometry
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—Howard Estabrook (1884–1978)
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“The history of philosophy is to a great extent that of a certain clash of human temperaments.”
—William James (1842–1910)