arc sine


noun Trigonometry.

the angle, measured in radians, that has a sine equal to a given number. Abbreviation: arc sin, arcsin; Symbol: sin−1

Origin of arc sine

First recorded in 1905–10
Also called inverse sine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Science definitions for arc sine

arc sine


The inverse of the sine function.
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