Origin:
Meaning:
In mathematics, the sine of an angle is the ratio of the length of the opposite side (the side opposite the angle) to the length of the hypotenuse (the side opposite the right angle) in a right triangle.
Etymology:
The English word "sine" derives from the Latin word "sinus," which originally meant "bend," "curve," or "bay." The Latin word is thought to have been borrowed from the ancient Greek word "σηνός" (sēnos), which had a similar meaning. The Greek word may have been derived from the Proto-Indo-European root *sei-, meaning "to bend."
In mathematics, the term "sine" was first used by an Indian mathematician named Aryabhata in the 6th century AD. Aryabhata used the Sanskrit word "jya" to refer to what we now call the sine, and this was later translated into Arabic as "jayb." The Arabic word was then adopted into Latin as "sinus," from which our English word derives.
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