asin() math function to get arc sine of input number in radian in Python

asin(x) returns arc sin of x. Input number is in radian

import math
print(math.asin(1))     # 1.5707963267948966
print(math.asin(0.56))  # 0.5943858000010622
print(math.asin(-0.56)) # -0.5943858000010622
print(math.asin(-1))    # -1.5707963267948966
print(math.asin(0))     # 0.0

Note that all the inputs are in radian.
For any value more than 1 or less than -1 , we will get ValueError

print(math.asin(1.01))
print(math.asin(-1.01))

Above code will generate error.

Inputs in degree

We can convert radian value to degree and use the same

import math
in_degree = 57
in_redian = math.radians(in_degree)
print(math.asin(in_redian))

Output

1.4691422654884898

1 radian = 57.2957914331 degree
1 degree = 0.0174533 radian

Drawing graph of asin()

In our Trigonometric language asin is also know as arcsin. Using this we will use Matplotlib to generate graph of asin $asin graph$

import matplotlib.pyplot as plt
x=[]
y=[]
i=-1
while (i<=1):
    x.append(i)
    y.append(math.asin(i))
    i=i+0.01
plt.plot(x,y)    
plt.show()

acos() cos() sin() tan()

Math Functions copysign() Python- Tutorials

Subhendu Mohapatra

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