Using the Excel ASIN Function
SummaryThe 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.
Number 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 NotesThe 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.