What is Math.tan() in Ruby?
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The tan() function calculates and returns the tangent of a number. To be more specific, it returns the tangent of a number in radians.
Figure 1 shows the mathematical representation of the tan() function.
Note:
- This function is present in the
Mathmodule.- This
tan()function only works for right-angled triangles.
Syntax
tan(num)
Parameter
This function requires a number that represents an angle in radians as a parameter.
To convert degrees to radians, use the following formula.
radians = degrees * ( pi / 180.0 )
Return value
tan() returns the tangent of a number that is set as a parameter. The return value is in the range [-1,1].
Example
#positive number in radiansputs "The value of tan(2.3) : ", Math.tan(2.3)#negative number in radiansputs "The value of tan(-2.3) : ", Math.tan(-2.3)#converting the degrees angle into radians and then applying tan()#degrees = 45#PI = 3.14159265result = 45 * (Math::PI / 180.0)puts "The value of tan(#{result}) : ", Math.tan(result)
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