C Math Library
C Math Library
The <math.h> header defines various mathematical functions and one macro. Many functions are available in this library to take double as an argument and then return double as a result. As explained in the previous tutorial, here are more functions that can be used in <math.h> library
- double exp (double number)
The exp() returns the value of e raised to the power of the given number.
E.g.:
#include <stdio.h>
#include <conio.h>
#include <math.h>
int main()
{
double x = 12.0, result;
result = exp(x);
printf (“The exponential value of 12 is = %.2lf”, x, result);
return 0;
}
Output
- double fmod (double number 1, double number 2)
It returns the remainder of the number 1 divided by the number 2. It works as a modulus function.
E.g.:
#include <stdio.h>
#include <conio.h>
#include <math.h>
int main ()
{
int a, b, c;
a = 8;
b = 6;
c = 4;
printf("The remainder of 8 / 4 is %lf \n", fmod(a, c));
printf("The remainder of 8 / 6 is %lf \n", fmod(a, b));
printf("The remainder of 6 / 4 is %lf \n", fmod(b, c));
return(0);
}
Output
- double acos (double number)
The acos() returns the arc cosine of the number given in radians.
E.g.:
#include <stdio.h>
#include <math.h>
int main()
{
const double PI = 3.1415926;
double x, result;
x = -0.5;
result = acos(x);
printf("the inverse of cos(-0.5) = %.2lf in radians\n", result);
/* converting radians to degree */
result = acos(x)*180/PI;
printf("The inverse of cos(-0.5) = %.2lf in degrees\n", result);
/* paramter not in range*/
x = 1.2;
result = acos(x);
printf("Inverse of cos(1.2) = %.2lf", result);
return 0;
}
Output
- double asin (double number)
The asin() returns the arc sine of the number given in radians.
E.g.:
#include <stdio.h>
#include <math.h>
int main()
{
const double PI = 3.1415926;
double x, result;
x = -0.5;
result = asin(x);
printf("the inverse of sine(-0.5) = %.2lf in radians\n", result);
/* converting radians to degree */
result = asin(x)*180/PI;
printf("The inverse of sine(-0.5) = %.2lf in degrees\n", result);
/* paramter not in range*/
x = 1.2;
result = asin(x);
printf("The inverse of sine(1.2) = %.2lf", result);
return 0;
}
Output
- double atan (double number)
The atan() returns the arc tangent of the number given in radians.
E.g.:
#include <stdio.h>
#include <math.h>
#define PI 3.141592654
int main()
{
double num = 1.0, result;
result = atan(num);
printf("The inverse of tan(1.0) = %.2f in radians \n", result);
// Converting radians to degrees
result = (result * 180) / PI;
printf("the Inverse of tan(1.0) = %.2f in degrees \n", result);
return 0;
}
Output
- double cos (double number)
The cos() returns the cosine of the number in radian.
E.g.:
#include <stdio.h>
#include <math.h>
#define PI 3.14159265
int main ()
{
double x, ret, val;
x = 60.0;
val = PI / 180.0;
ret = cos( x*val );
printf("The cosine of %lf is %lf degrees\n", x, ret);
x = 90.0;
val = PI / 180.0;
ret = cos( x*val );
printf("The cosine of %lf is %lf degrees\n", x, ret);
return 0;
}
Output
- double cosh (double number)
It returns the hyperbolic cosine of the value of the number.
E.g.:
#include <stdio.h>
#include <math.h>
int main ()
{
double x, result;
x = 0.5;
result = cosh(x);
printf("Hyperbolic cosine of 0.5 (in radians) = %lf\n", x, result);
x = -0.5;
result = cosh(x);
printf("Hyperbolic cosine of -0.5 (in radians) = %lf\n", x, result);
x = 0;
result = cosh(x);
printf("Hyperbolic cosine of 0 (in radians) = %lf\n", x, result);
return 0;
}
Output
- double sin (double number)
It returns the sine of the number in radian.
E.g.:
#include <stdio.h>
#include <math.h>
int main()
{
double x;
double result;
x = 2.3;
result = sin(x);
printf("The sin(2.3) = %.2lf \n", result);
x = -2.3;
result = sin(x);
printf("The sin(-2.3) = %.2lf \n", result);
x = 0;
result = sin(x);
printf("The sin(0) = %.2lf \n", result);
return 0;
}
Output
- double sinh (double number)
It returns the hyperbolic sine of the value of the number.
E.g.:
#include <stdio.h>
#include <math.h>
#define PI 3.141592654
int main()
{
double angle = 2.50, result;
result = sinh(angle);
printf("Sine hyperbolic of 2.50 (in radians) = %.2lf", angle, result);
return 0;
}
Output
- double tanh (double number)
It returns the hyperbolic tangent of the value of the number.
E.g.:
#include <stdio.h>
#include <math.h>
int main ()
{
double x, result;
x = 0.5;
result = tanh(x);
printf("The hyperbolic tangent of 0.5 is %lf degrees", result);
return(0);
}
Output
- double modf (double number, double *integer)
It returned those value which will be the fraction component and sets the integer to the integer component.
E.g.:
#include<stdio.h>
#include<math.h>
int main ()
{
double x, fractpart, intpart;
x = 3.345;
fractpart = modf(x, &intpart);
printf("The integral part = %lf\n", intpart);
printf("The fraction Part = %lf \n", fractpart);
return(0);
}
Output
