C ++ <cmath> in a variety of commonly used functions

 

#include<cmath>

 

Trigonometric functions:

It can directly call the corresponding method:

double sin (double);

double cos (double);

double tan (double);

double atan (double);   

Note: All values ​​of x radians (radians), i.e. with 180 3.14159 .. FIG.

For example calculated sin (π / 2), then the code is as follows:

int main(void)

{    

printf("%f", sin(M_PI/2));     

return 0;

}

Corresponding to cos, tan, ctan same usage: COS ( M_PI / 2), Tan (M_PI / 2), CTAN (M_PI / 2)

Extended Information:

c ++ commonly used functions:

1, an inverse trigonometric function

double asin (double); results between [-PI / 2, PI / 2 ]

double acos (double); results between [0, PI]

double atan (double); arctangent (primary value), the results between [-PI / 2, PI / 2]

double atan2 (double, double); arctangent (full circle value), the results between [-PI / 2, the PI / 2]

2, hyperbolic trigonometric

double sinh (double);

double cosh (double);

tanh Double (Double);

. 3, index and number of

double exp (double);

double pow (double, double);

double sqrt (double);

double log (double); logarithm to the base e

double log10 (double);