Ruby CMath cos() Method with example

cos() method is Math class which is used to returns the cosine of the given value.

Syntax: Math.cos(z)

Parameter: Here, z is the value whose cosine is to be calculated.

Returns: This method returns the cosine value of the z.

Example 1:

# Ruby code for cos() method
require 'cmath'

# Initializing values
a = 0.3584
b = 2

# Printing result
puts "cos value of a : #{CMath.cos(a)}\n\n"
puts "cos value of b : #{CMath.cos(b)}\n\n"

Output:

cos value of a : 0.9364592642630104

cos value of b : -0.4161468365471424

Example 2:

# Ruby code for cos() method
require 'cmath'

# Initializing values
a = 0
b = -0.247

# Printing result
puts "cos value of a : #{CMath.cos(a)}\n\n"
puts "cos value of b : #{CMath.cos(b)}\n\n"

Output:

cos value of a : 1.0

cos value of b : 0.9696502723724634