Across
- 3. - Wrote the first treatise on trigonometry.
- 5. - Prolific mathematician who explored many areas of math despite losing sight in one eye.
- 6. - Greek word for triangle.
- 8. - Ancient astronomer who wrote the Almagest.
- 9. - Founder of trigonometry.
- 10. - Greek word for measure.
- 12. - The branch of math that deals with angles and triangles.
- 13. - Simplified the exposition of trigonometry through his systematic use of algebra
- 15. - Type of trigonometry dealing with flat, two-dimensional triangles.
- 18. - Sign (×) introduced by Oughtred.
- 22. - Sine, cosine, and tangent are examples of these.
- 23. - Influential astronomical book translated by Regiomontanus.
- 25. - study of spherical triangles, which are formed by the intersection of three great circle arcs on the surface of a sphere.
- 26. - Introduced the concepts of tangent and cotangent.
Down
- 1. - An era known as the revival of learning.
- 2. - A trigonometric function introduced by the Arabs.
- 4. - A kind of sphere that is ised to describe the positions of planets.
- 7. - Translated the Almagest.
- 8. - used Arabic numerals to prepare a table of sines
- 10. - Was written by Abraham de Moivre. It was published in 1730. The work is notable for containing early uses of the normal curve, Stirling's approximation for large factorials, and the law of large numbers.
- 11. - wrote the treatise on trigonometric theorems with special reference to infinite series (Miscellanea Analytica, 1730)
- 14. - First to relate trigonometric functions to angles
- 15. - wrote the first book entitled Trigonometry
- 16. - Birthplace of Hipparchus.
- 17. - It’s the meaning of “measure” in Greek
- 19. - Study of heavenly bodies.
- 20. - Earth-centered model supported by Ptolemy.
- 21. - Introduced "sin", "cos", and "tan" as abbreviations in mathematics.
- 24. - Origin of trigonometry traces back to this group of people