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cos() - Find Cosine Value - C++ Mathematical Function Tutorial

cos() - Mathematical Function

How is Mathematical Function "cos()" used in C++?
How to find the cosine value of an argument using c++?

Explanation

cos() is a Mathematical Function that returns the cosine Value for the given radians.

Syntax to find Cosine Value:


float cos( float arg );
double cos( double arg );
long double cos( long double arg );

Example :



#include <iostream.h>
#include <cmath.h>
const double PI = 3.14159265;
int main()
{
cout << "The cosine value of 0 is :: "
<< cos(0)
<< endl;
cout << "The cosine value of PI is :: "
<< cos(PI) << endl;
return 0;
}

Result :

The cosine value of 0 is :: 1
The cosine value of PI is :: -1

In the above example cos() is used to find the cosine value for "0" and the constant "PI".

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