acos() method is CMath class which is used to returns the arc cosine of the given value.
Syntax: Math.acos(z) Parameter: Here, z is the value whose arc cosine is to be calculated. Returns: This method returns the arc cosine value of the z.
Example #1:
Ruby
# Ruby code for acos() method require 'cmath'
# Initialize value a = 0 . 3584
b = 2
# Printing result puts "acos value of a : #{CMath.acos(a)}\n\n"
puts "acos value of b : #{CMath.acos(b)}\n\n"
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Output:
acos value of a : 1.204242852965772 acos value of b : 0.0+1.3169578969248164i
Example #2:
Ruby
# Ruby code for acos() method require 'cmath'
# Initialize value a = 0
b = - 0 . 247
# Printing result puts "acos value of a : #{CMath.acos(a)}\n\n"
puts "acos value of b : #{CMath.acos(b)}\n\n"
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Output:
acos value of a : 1.5707963267948966 acos value of b : 1.8203794286756558