7.8.6 Mathematical Functions

There are more than twenty mathematical functions declared in <math.h>; here are some of the more frequently used. Each takes one or two double arguments and returns a double. sin(x)  sine of x, x in radians cos(x)  cosine of x, x in radians atan2(y,x) arctangent of y/x, in radians exp(x)  exponential function ex log(x)  natural (base e) logarithm of x (x>0) log10(x)  common (base 10) logarithm of x (x>0) pow(x,y)  xy sqrt(x)  square root of x (x>0) fabs(x)  absolute value of x