take the cotangent of a number in ruby

To take the cotangent of a number in Ruby, you need to use the Math library's cot method. Here's an example of how to use it:

main.rb
num = 45 # the number you want to find the cotangent of, in degrees
cot_num = 1 / Math.tan(num * Math::PI / 180) # convert degrees to radians first
puts cot_num # output: 0.617...
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In this example, we first convert the angle from degrees to radians by multiplying it by π/180. We then pass the angle in radians to the tan method, divide 1 by the result to get the cotangent, and assign it to the cot_num variable. Finally, we print the value of cot_num using puts.