In this tutorial, we will discuss cos function in C programming language
Description of cos() Arithmetic function in C programming language
The cos() in C programming language returns the cosine of the radian angle x.
cos() : In the C Programming Language,the cos() is used to calculate cosine value .
The declaration of the cos() in C programming language is
double cos(double x);
the parameter of cos is:
x – it is floating point value is used for angle as the parameter of this function. It is always measured in radians.
The cos function returns cosine value of x, measured in radians
The required header of the cos() is
#include <math.h>
following example shows the usage of the cosine function.
Program 1
#include <stdio.h>
#include <stdlib.h>
int main()
{
double x=0.5;
double y=1.0;
printf("cosine value of %f is %f\n",x,cos(x));
printf("cosine value of %f is %f\n",y,cos(y));
getch();
return 0;
}
When the above program is compiled and run, it will produce the following results.
cosine value of 0.500000 is: 0.877583 cosine value of 1.000000 is: 0.540302
Program 2
#include <stdio.h>
#include <math.h>
int main()
{ //define the variable
double cosineValue;
double inputValue;
//get input from user
printf("Please enter the value to calculate cosine value :");
scanf("%lf",&inputValue);
//calculate the cosine value
cosineValue=cos(inputValue);
//display the cosine value
printf("\ncosine value of %lf is %lf\n",inputValue,cosineValue);
getch();
return 0;
}
When the above program is compiled and run, it will produce the following results.
Please enter the value to calculate cosine value :0.5 cosine value of 0.500000 is 0.877583
Similar Functions
Other C programming language functions that are similar to the cosine function
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