Unknown Story
Updated: 12/2/2020
Unknown Story

Storyboard Text

  • In 13th century, there was a Persian mathematician named Nasir al-Din al-Tusi at Maragheh, Iranian Azerbaijan under Mongol Empire,
  • Thank you Hülegü, I'll make sure it's not only used for astronomical reaserch but library as well.
  • I've built this conservatory for you Tusi, please make use of it.
  • And so, the Persian scholar, Nasir Al-Din Al-Tusi begin many translations and researches at the conservatory,
  • I think I'll do tables of planetary movements to calculate positions of planets and names of the stars.
  • Then, I'll invent geometrical technique for the planetary model and name it Tusi-Couple!
  • Nasir Al-Din Al-Tusi also formulate the famous law of sines for plane triangles..
  • The ideas then were compiled in a book called Zij-i ilkhani (Ilkhanic Tables)...
  • And I think it's time to separate trigonometry from astronomy and make it a distinct discipline
  • Using previous works on sine function, he gavethe first extensive interpretation of spherical trigonometry that never been done before.
  • ..as well as the law of sines for spherical triangles
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