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asin() Method in Python

Author:JIYIK Last Updated:2025/05/04 Views:

sineThe inverse of a function is called arcsine. Sine is equal to the ratio of the side opposite the hypotenuse to the longest side.

sineThe inverse of the function calculates the angle between the two sides. Assuming we have an 角度θ, then θthe formula 正弦for 反正弦the sum of will follow.

Sine Function -> sin(θ) = (Side opposit to θ angle) / (Hypotenuse)
Arcsine Function -> θ = sin⁻¹((Side opposit to θ angle) / (Hypotenuse))

Python programming language has a built-in module mathwhich is a part of the standard Python library.

This module has one method, asin(), which is used to perform 反正弦the operation.

asin()In this article, you will learn how to calculate the arc sine or the reciprocal of the sine in Python using the method.


asin()Using the method in Python

asin()Method accepts a single floating point value which should be [-1, 1]in the range , inclusive.

asin()Method will calculate the angle in radians of the supplied floating point value.

To convert radians to degrees, use 1radians equals 57.296degrees. Alternatively, multiply the radian value by 180 / πto convert it to degrees.

1 radian = 57.296 degrees
1 radian * 180 / π = 57.296 degrees

Let's understand asin()the usage of method with the help of some relevant examples. See the following Python code.

import math

print(math.asin(0))
print(math.asin(1))  # π / 2
print(math.asin(-1))  # -π / 2
print(math.asin(10 / 20))
print(math.asin(40 / 50))
print(math.asin(-10 / 20))
print(math.asin(-40 / 50))

Output:

0.0
1.5707963267948966
-1.5707963267948966
0.5235987755982989
0.9272952180016123
-0.5235987755982989
-0.9272952180016123

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