# ASIN

Formulas / ASIN
Calculate the inverse sine of a number.
`=ASIN(number)`
• number - the sine of the angle

## Examples

• `=ASIN(0.5)`

The ASIN function can be used to calculate the arc sine of a number. In its simplest form it takes a value between -1 and 1 as a parameter. This formula calculates the arc sine of 0.5, and return 0.524 radians.

• ` =ASIN(0.5)*180/PI()`

This formula will convert the result of the arc sine calculation from radians to degrees, and will return 30 degrees.

• ` =DEGREES(ASIN(0.5))`

Alternatively, the DEGREES function can be used in conjunction with the ASIN function to achieve the same conversion from radians to degrees, and will also return 30 degrees.

## Summary

The ASIN function calculates the arcsine of a number, returning an angle in radians between -pi/2 and pi/2. The angle must be between -1 and 1.

• The ASIN function calculates the inverse sine (or arc-sine) of a number which must be between -1 and 1, and returns it in radians.
• The ASIN function is the inverse of the SIN function.
• The output of the ASIN function can be converted to degrees by multiplying by 180/PI() or by using the DEGREES function. 