The ASIN function returns the arcsine of a number.
The result is an angle in radians in the range from −π/2 to π/2.
This function is useful in mathematical and engineering calculations where trigonometric functions are required.
Syntax
ASIN(value)
Argument |
Description |
Permitted values |
|---|---|---|
value |
Number for which the arcsine is calculated |
Value ranging from −1 to 1. Can be specified as a number, formula, function, or cell reference |
Examples of use
Calculation of arcsine for 1
=ASIN(1)
Result: π/2 radians (~1.5708), since ASIN(1)=π/2.
Attempt to use a value out of range [−1, 1]
=ASIN(2)
The expression returns the #NUM! error because arcsine is only defined for values in the range [−1, 1].
Notes
–The return value is in radians.
–To obtain the result in degrees, use the DEGREES function: =DEGREES(ASIN(value))