C++ Math tan() Function

In this post today I am going to explain the C++ Math tan() Function.

The tangent of an angle provided in radians is found using this function.

Syntax of tan() function:

Consider a radian ‘x’. The syntax would be:

float tan(float x);  
double tan(double x);  
long double tan(long double x);  
double tan(integral x);

Note that if the value is an integral type, it will be converted to double.

Parameter:

x: The value given in radian.

Return Value:

It returns the tangent of an angle given in radian.

Example-1:

Let’s have a look at a basic case where x is positive.

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   float degree=10;  
   float radian=degree*3.14/180;  
   cout<<"Tangent of an angle is : "<<tan(radian);  
   return 0;  
}

Output:

Tangent of an angle is : 0.176236

When the value of a degree is equal to10, the tan() function calculates the tangent of an angle.

Example-2:

Let’s look at a basic case where the degree value is negative.

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
  float degree= -60;  
  float radian=degree*3.14/180;  
  cout<<"Tangent of an angle is :"<<tan(radian);  
  return 0;  
}

output: