### 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 Quant > 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!

 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.