The cos() is an inbuilt function in Ruby returns the cosine value of a given angle expressed in radians which is in range [-inf, +inf]. The returned value is in range [-1, +1].
Syntax: Math.cos(value)
Parameters: The function accepts one mandatory parameter value whose corresponding cosine value is returned.
Return Value: It returns the cosine value.
Example 1:
#Ruby program for cos() function #Assigning values val1 = 1 val2 = 0.5 val3 = -1 val4 = -0.9 #Prints the cos() value puts Math. cos (val1)
puts Math. cos (val2)
puts Math. cos (val3)
puts Math. cos (val4)
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Output:
0.5403023058681398 0.8775825618903728 0.5403023058681398 0.6216099682706644
Example 2:
#Ruby program for cos() function #Assigning values val1 = 109 val2 = 133 val3 = -13243 val4 = -9898 #Prints the cos() value puts Math. cos (val1)
puts Math. cos (val2)
puts Math. cos (val3)
puts Math. cos (val4)
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Output:
-0.577002178942952 0.4948722204034305 -0.37447564566939956 -0.40075875500376773
Reference: https://devdocs.io/ruby~2.5/math#method-c-cos