Math Library Functions in C++
C++ provides a large set of mathematical functions which are stated below:
| Function | Description |
|---|---|
| double sin(double) | This function takes angle (in radian) as an argument and returns its sine value that could be verified using sine curve. |
| double cos(double) | This function takes angle (in radians) as an argument and returns its cosine value that could be verified using cosine curve. |
| double tan(double) | This function takes angle (in radians) as an argument and returns its tangent value. This could also be verified using Trigonometry as Tan(x) = Sin(x)/Cos(x). |
| double sqrt(double) | This function takes a number as an argument and returns its square root value. The number can not be a negative value. |
| int abs(int) | This function takes an integer number as an argument and returns its absolute value. It means the output will always be positive regardless of the sign of the input. |
| double pow(double, double) | This function takes one argument as base and another as exponent. |
| double hypot(double, double) | This function requires two sides of the right-angled triangle to give output as its hypotenuse. |
| double floor(double) | This functions returns the integer value lesser or equal to the argument passed in the function. |
| double fabs(double) | This function returns the absolute value of any number. |
| double acos(double) | This function returns the arc cosine of the argument. The argument to acos() must be in the range -1 to 1; otherwise, a domain error occurs. |
| double asin(double) | This function returns the arc sine of the argument. The argument to asin() must be in the range -1 to 1; otherwise, a domain error occurs. |
| double atan(double) | This function returns the arc tangent of arg. |
| double atan2(double, double) | This function returns the arc tangent of (double a)/(double b). |
| double ceil(double) | This function returns the smallest integer as double not less than the argument provided. |
| double cosh(double) | This function returns the hyperbolic cosine of the argument provided. The value of the argument provided must be in radians. |
| double tanh(double) | This function returns the hyperbolic tangent of the argument provided. The value of the argument provided must be in radians. |
| double log(double) | This function takes a number and returns the natural log of that number. |
| double exp(double) | This function returns the value of e = 2.718 raised to the given number. |
C++ Mathematical Functions
C++ being a superset of C, supports a large number of useful mathematical functions. These functions are available in standard C++ to support various mathematical calculations.
Instead of focusing on implementation, these functions can be directly used to simplify code and programs. In order to use these functions you need to include a header file- <math.h> or <cmath>.