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sin() function with example in C++

C++ sin() function: Here, we are going to learn about the sin() function with example of cmath header in C++ programming language?
Submitted by IncludeHelp, on April 27, 2019

C++ sin() function

sin() function is a library function of cmath header, it is used to find the sine of the given number (angle), it accepts a number (x) and returns the sine of angle x radians.

Syntax of sin() function:


Parameter(s): x – is the value of an angle in radians whose sine to be calculated.

Return value: double – it returns double type value that is the sine of given angle x radians.


    float x = 2.45;
    Function call:

C++ code to demonstrate the example of sin() function

// C++ code to demonstrate the example of 
// sin() function

#include <iostream>
#include <cmath>
using namespace std;

// main() section
int main()
    float x;
    x = -10.23;
    cout<<"sin("<<x<<"): "<<sin(x)<<endl;

    x = 0;
    cout<<"sin("<<x<<"): "<<sin(x)<<endl;    

    x = 2.45;
    cout<<"sin("<<x<<"): "<<sin(x)<<endl;    
    return 0;


sin(-10.23): 0.720984
sin(0): 0
sin(2.45): 0.637765

Reference: C++ sin() function

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