Declaration

double tan(double dX);

Description

This function returns the tangent of the passed-in argument.

Overloads

float tan(float);
double tan(double);
long double tan(long double);

Related Functions

float tanf(float);
long double tanl(long double);

* Note: Since C does not allow function overloading, these other versions of this function exist.

Domain (-∞, ∞) \ {Π/2.0 +- k*Π} Range (-∞, ∞) Periodicity Π Symmetry Origin Asymptotes None

Example

#include <iostream>
#include <cmath>

int main() {
    using namespace std;

    double dX = -1000.0;
    cout << "x = " << dX << "  tan(x) = " << tan(dX) << endl;

    dX = 1.8;
    cout << "x = " << dX << "  tan(x) = " << tan(dX) << endl;

    return 0;
}

Output