#include <math.h> int abs (int n) - Get absolute value of an integer. double acos(double x) - Compute arc cosine of x. double asin(double x) - Compute arc sine of x. double atan(double x) - Compute arc tangent of x. double atan2(double y, double x) - Compute arc tangent of y/x. double ceil(double x) - Get smallest integral value that exceeds x. double cos(double x) - Compute cosine of angle in radians. double cosh(double x) - Compute the hyperbolic cosine of x. div_t div(int number, int denom) - Divide one integer by another. double exp(double x - Compute exponential of x. double fabs (double x ) - Compute absolute value of x. double floor(double x) - Get largest integral value less than x. double fmod(double x, double y) - Divide x by y with integral quotient and return remainder. double frexp(double x, int *expptr) - Breaks down x into mantissa and exponent of no. labs(long n) - Find absolute value of long integer n. double ldexp(double x, int exp) - Reconstructs x out of mantissa and exponent of two. ldiv_t ldiv(long number, long denom) - Divide one long integer by another. double log(double x) - Compute log(x). double log10 (double x ) - Compute log to the base 10 of x. double modf(double x, double *intptr) - Breaks x into fractional and integer parts. double pow (double x, double y) - Compute x raised to the power y. int rand (void) - Get a random integer between 0 and 32. int random(int max_num) - Get a random integer between 0 and max_num. void randomize(void) - Set a random seed for the random number generator. double sin(double x) - Compute sine of angle in radians. double sinh(double x) - Compute the hyperbolic sine of x. double sqrt(double x) - Compute the square root of x. void srand(unsigned seed) - Set a new seed for the random number generator (rand). double tan(double x) - Compute tangent of angle in radians. double tanh(double x) - Compute the hyperbolic tangent of x.