How to Find Inverse of sine or Arc sine in Python using asine() Function

To find out the inverse of sine or arcsine in Python we use math.asin() function or Standard math Library. The inverse of sine is also called arcsine.

asin() Function in Python

math.asin() function exists in Standard math Library of Python Programming Language. The purpose of this function is to calculate arcsine or the inverse of the sine of any given number within the range of -1 and 1.


Python asin() Function Syntax

The syntax of asin() function in Python is
math.asin( x )


Python asin() Function Parameters

X Any valid Python number (positive or negative within the range of -1 and 1). This parameter is required.
Note: if the x parameter is not a number or greater than 1, asin() function will return an error.


Python asin() Function Compatibility

Python 2.x – Yes
Python 3.x – Yes


Python asin() Function Return Value

asin() function will return a floating point number (a value of the inverse of sine in radians).


Python asin() Function Example

# import math library
import math

print (math.asin(-0.2))
print (math.asin(0.0))
print (math.asin(0.2))
print (math.asin(1))

Output of Python asin() function:

Note that the unit of output is radian.