### ASIN(number)

Returns the arc-sine of a number.

 number The number you want the arcsine of.

#### Remarks

* The arc-sine is the inverse of the SIN function.
* This function is also called the inverse sine function.
* The "number" is the sine of an angle in radians.
* If "number" is not numeric, then #VALUE! is returned.
* If "number" > 1, then #NUM! is returned. Example 8.
* If "number" < -1, then #NUM! is returned. Example 9.
* The angle returned is in radians between -PI/2 and PI/2.
* If your argument is in degrees, multiply by PI/180 to convert it to radians
* If you want to convert the result from radians to degrees, multiply it by 180/PI.
* You can use the SIN function to return the sine.
* You can use the ACOS function to return the arc-cosine.
* You can use the ATAN function to return the arc-tangent.
* You can use the DEGREES function to convert from radians to degrees.
* For a working example refer to the Trigonometric Functions page.
* For the Microsoft documentation refer to support.office.com

 A 1 =ASIN(0.5) = 0.524 2 =ASIN(1) = 1.571 3 =ASIN(-1) = -1.571 4 =ASIN(SIN(1)) = 1 5 =DEGREES(ASIN(0.5)) = 30 6 =DEGREES(ASIN(-1)) = -90 7 =ASIN(-0.5)*180/PI() = -30 8 =ASIN(1.01) = #NUM! 9 =ASIN(-1.01) = #NUM! 10 =ASIN(6) = #NUM! 11 =ASIN("some text") = #VALUE!

#### Expand ...

1 - What is the arc-sine of 0.5 radians.
2 - What is the arc-sine of 1 radian.
5 - What is the arc-since of 0.5 radians in degrees.