Math Functions
The math.h header defines various mathematical functions. All the functions available in this library take double as an argument and return double as the result. You can find documentation via:
- http://devdocs.io/c/numeric/math
1-double acos(double x) (Returns the arc cosine of x in radians.)
2-double asin(double x)(Returns the arc sine of x in radians.)
3-double atan(double x)(Returns the arc tangent of x in radians.)
4-double atan2(double y, double x) (Returns the arc tangent in radians of y/x based on the signs of both values to determine the correct quadrant.)
5-double cos(double x)(Returns the cosine of a radian angle x.)
6-double cosh(double x)(Returns the hyperbolic cosine of x.)
7-double sin(double x)(Returns the sine of a radian angle x.)
8-double sinh(double x)(Returns the hyperbolic sine of x.)
9-double tanh(double x)(Returns the hyperbolic tangent of x.)
10-double exp(double x)(Returns the value of e raised to the xth power.)
11-double frexp(double x, int *exponent)(The returned value is the mantissa and the integer pointed to by exponent is the exponent. The resultant value is x = mantissa * 2 ^ exponent.)
12-double ldexp(double x, int exponent)(Returns x multiplied by 2 raised to the power of exponent.)
13-double log(double x)(Returns the natural logarithm (base-e logarithm) of x.)
14-double log10(double x)(Returns the common logarithm (base-10 logarithm) of x.)
15-double modf(double x, double *integer)(The returned value is the fraction component (part after the decimal), and sets integer to the integer component.)
16-double pow(double x, double y)(Returns x raised to the power of y.)
17-double sqrt(double x)(Returns the square root of x.)
18-double ceil(double x)(Returns the smallest integer value greater than or equal to x.)
19-double fabs(double x)(Returns the absolute value of x.)
20-double floor(double x)(Returns the largest integer value less than or equal to x).
21-double fmod(double x, double y)(Returns the remainder of x divided by y.)
Example -
#include <stdio.h>
#include <math.h>
int main ()
{
printf("Value 8.0 ^ 3 = %.2lf\n", pow(8.0, 3));
printf("Sqrt of 100 = %.2f\n", sqrt(100));
printf("log (100) = %.2f\n", log(100.0));
printf("sin (90) = %.2f\n", sin (90.0));
printf("ceil (10.45) = %.2f\n", ceil(10.45));
printf("floor (10.45) = %.2f\n", floor(10.45));
printf("fabs (-10.45) = %.2f\n", fabs(-10.45));
printf("round (10.45) = %.2f\n", round (10.45));
return(0);
}
