# cos() math function in python by R4R Team

- cos() is python math function which determine the cosine value of number.

Syntax-

math.cos(x)

- Here x should be a numeric value.
- it return the sine value of x in radians.

Example-

cos(0) will return 0.5253219888177297
cos(90) will -0.4480736161291701

program-

import math

print("cos(90) : ",math.cos(90))
print("cos(0) : ",math.cos(0))
print("cos(45) : ",math.cos(45))
print("cos(60) : ",math.cos(60))
print("cos(10) : ",math.cos(10))

output-

cos(90) : -0.4480736161291701
cos(45) : 1.0
cos(0) : 0.5253219888177297
cos(30) : -0.9524129804151563
cos(10) : -0.8390715290764524

-If we want to print the cosine value of x, consider x should be in degree then

program-

import math
#these value are in degree
n=math.pi/180
print("cos(90) : ",math.cos(90*n))
print("cos(0) : ",math.cos(0*n))
print("cos(45) : ",math.cos(45*n))
print("cos(60) : ",math.cos(60*n))
print("cos(10) : ",math.cos(10*n))

output-

cos(90) : 6.123233995736766e-17
cos(0) : 1.0
cos(45) : 0.7071067811865476
cos(60) : 0.5000000000000001
cos(10) : 0.984807753012208