Enter any number into the inverse sine calculator. The calculator will display the inverse sine of that number in terms of degrees or radians.

## What is the inverse sine?

Inverse sine, or arcsine, is a mathematical function that helps us find the angle whose sine value matches a given number. It is denoted as sin⁻¹ or asin. In simpler terms, the inverse sine gives us the angle that produces a specific sine value.

Sine is a trigonometric function that relates the ratio of the length of the side opposite an angle to the length of the hypotenuse in a right-angled triangle. The sine function takes an angle as input and outputs a value between -1 and 1. However, the inverse sine function reverses this process. Instead of taking an angle and finding the sine value, it takes a sine value and determines the corresponding angle.

Inverse sine is particularly useful in various fields of mathematics, physics, and engineering.

For instance, it is essential in solving problems involving triangles, such as determining unknown angles or sides. In geometry, inverse sine helps calculate angles in non-right-angled triangles using the Law of Sines.

## What can the inverse sine be used?

The inverse sine can be used when the value of the sine is known and you want to find the corresponding angle. Often the value of sine is known because it is also represented as the value of a triangle’s opposite side of the adjacent side of an angle.

If you can then measure those to the sides and get the sine value, you can use the inverse sine function to calculate the angle corresponding to that value.