Using the Excel ASIN Function

Summary
The Excel ASIN function returns the inverse, or arcsine, of a number. The output of the ASIN function is an angle in radians with the range -pi/2 to pi/2.Syntax
=ASIN (number)Syntax Breakdown
NumberNumber is required in the ASIN function. This is the sine of the angle that you would like to find. Number must be in the range of -1 to 1.
Usage Notes
The ASIN function is able to find the inverse of the sine function.Expressing ASIN in Degrees
Multiplying the result of the ASIN function by 180/PI() can be used to express the arcsine in degrees. You could also use the DEGREES function.
