"The linguistic error of translation in the term “sine” was accompanied by a conceptual error, as in the very word “trigonometry” where the functions relate to the circle, not the triangle. That error persists to this day in the teaching of “trigonometry” which is stuck in the pre-Āryabhat.a era. The word “trigonometry” is in quotes, since this geometric method wrongly suggests that the concepts of sine and cosine relate to the triangle, whereas they actually relate to the circle."