| double acos(double x); | Trigonometric function returns the angle whos cosine is x. The value of x must be between -1 and +1, otherwise a domain error occurs. The angle is measured in radians. |
| double asin(double x); | Returns the angle whos sine is x. The angle returned is in radians. A value of x must be between -1 and +1. |
| double atan(double x); | Returns angle whos tangent is x. The angle is always between -PI/2 and +PI/2 radians. |
| double atan2(double y, double x); | Returns the angle based on y being the opposite side and x being the adjacent side of a right triangle. Note: Whether y and/or x are negative or positive determines which quadrant the angle is in. |
| double ceil(double x); | Returns the smallest integral value that is greater than or equal to x. |
| double cos(double x); | Returns the cosine of the angle x, x must be in radians. |
| double cosh(double x); | Returns the hyperbolic cosine of the angle x. |
| double exp(double x); | Returns the exponential function of x. In mathematics it is written as ex. |
| double fabs(double x); | Returns the absolute value of x. |
| double floor(double x); | Returns the largest integral value that is less than or equal to x. |
| double fmod(double x, double y); | Returns the floating point remainder of x/y. |
| double frexp(double x, int *exp); | Returns a normalized fraction and an integral power of 2. The power of 2 is returned in exp. |
| double ldexp(double x, int exp); | Returns x*2exp. |
| double log(double x); | Returns the natural logarithm of x (logarithm to base e). |
| double log10(double x); | Returns the logarithm of x (logarithm to the base 10). |
| double modf(double x, double *i); | Divides x into integral and fractional parts. The integral part is returned in i. The return value of the function is the fractional part. |
| double pow(double x, double y); | Returns the value of xy. |
| double sin(double x); | Returns the sine of the angle x. The angle x must be in radians. |
| double sinh(double x); | Returns the hyperbolic sine of the angle x. |
| double sqrt(double x); | Returns the square root of x. x must be positive. |
| double tan(double x); | Returns the tangent of the angle x. x must be in radians. |
| double tanh(double x); | Returns the hyperbolic tangent of x. |