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tan(x as float) in Math Library Functions of Programming in CPP
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Usage 
The Tangent function is used to return tangent value of the angle given.
Syntax 
tan(angle)
Example
#include <stdio.h>   
#include <math.h>   

int main ()
{

  printf ("The  tangent of degrees =", tan (30) );
  return 0;
}
Output 
The  tangent of degrees = 0.57735026919
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Math Library Functions of Programming in CPP
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