1. Hipparchus
2. Claudius Ptolemaeus
3. The Sinhala people in Sri Lanka
4. The Indian mathematician Aryabhata
5. Brahmagupta
6. Abul Wáfa
7. Ibn Yunus
8. Vedanga Jyotisha Lagadha
9. Omar Khayyám
10. Bhaskara
11. Nasir al-Din Tusi, along with Bhaskara
12. al-Kashi and Timurid mathematician Ulugh Beg (grandson of Timur)
13. Bartholemaeus Pitiscus
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Some trigonometry mathematicians also worked on other aspects of mathematics. Hope that answers your question.
Ancient Egyptian and Babylonian mathematicians lacked the concept of an angle measure, but they studied the ratios of the sides of similar triangles and discovered some properties of these ratios. The ancient Nubians used a similar methodology.
It is a number - in trigonometry or elsewhere.
how can trigonometry use in metallurgy
Some key contributors to the development of trigonometry include ancient civilizations such as the Babylonians and Egyptians, who used rudimentary trigonometric concepts for practical purposes. The Greek mathematician Hipparchus is often credited with formalizing the field of trigonometry, introducing the trigonometric functions and developing the earliest trigonometric tables. Later, Islamic mathematicians such as Al-Battani and Al-Khwarizmi made significant advancements in trigonometry, further expanding its applications in astronomy, geography, and mathematics. These early pioneers laid the foundation for the modern study and application of trigonometry in various fields.