Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
The inverse sine function, denoted as sin^-1(x) or arcsin(x), is the angle whose sine is equal to x. It gives us the measure of an angle when we know its sine value.
Related terms
Sine Function: The sine function (sin(x)) gives us the ratio of the length of the side opposite an angle in a right triangle to the length of the hypotenuse.
These functions (such as arcsin, arccos, and arctan) help us find angles when we know certain trigonometric ratios.
Domain and Range: When working with inverse trigonometric functions, it's important to understand their domain (input values) and range (output values).