#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    cout<<"———————————————————————————————————————————";
    cout<<"\nProgram to use the math library functions";
    cout<<"\n———————————————————————————————————————————";
    cout<<"\nfabs (3.9)    | "<<fabs(3.9);
    cout<<"\nceil (3.9)    | "<<ceil(3.9);
    cout<<"\nfloor(3.9)    | "<<floor(3.9);
    cout<<"\ne^0           | "<<exp(0);
    cout<<"\npow(0,0)      | "<<pow(0, 0);
    cout<<"\nlog(2)Natural | "<<log(2);
    cout<<"\nlog10(2)      | "<<log10(2);
    cout<<"\nsqrt(20)      | "<<sqrt(20);
    cout<<"\nsin(90)radian | "<<sin(90);
    cout<<"\ncos(90)       | "<<cos(90);
    cout<<"\ntan(90)       | "<<tan(90);
    cout<<"\n———————————————————————————————————————————\n";
    return 0;
}

kodingwindow@kw:~$ g++ kw.cpp
kodingwindow@kw:~$ ./a.out
———————————————————————————————————————————
Program to use the math library functions
———————————————————————————————————————————
fabs (3.9)    | 3.9
ceil (3.9)    | 4
floor(3.9)    | 3
e^0           | 1
pow(0,0)      | 1
log(2)Natural | 0.693147
log10(2)      | 0.30103
sqrt(20)      | 4.47214
sin(90)radian | 0.893997
cos(90)       | -0.448074
tan(90)       | -1.9952
———————————————————————————————————————————
kodingwindow@kw:~$ 

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    cout<<"———————————————————————————————————————————";
    cout<<"\nProgram to use the math library functions";
    cout<<"\n———————————————————————————————————————————";
    cout<<"\nValue of PI         | "<<M_PI;
    cout<<"\nValue of PI/2       | "<<M_PI_2;
    cout<<"\nValue of PI/4       | "<<M_PI_4;
    cout<<"\nValue of 1/PI       | "<<M_1_PI;
    cout<<"\nValue of 2/PI       | "<<M_2_PI;
    cout<<"\nValue of log2e      | "<<M_LOG2E;
    cout<<"\nValue of log10e     | "<<M_LOG10E;
    cout<<"\nValue of Nlog2      | "<<M_LN2;
    cout<<"\nValue of Nlog10     | "<<M_LN10;
    cout<<"\nValue of sqrt(1/2)  | "<<M_SQRT2;
    cout<<"\nValue of 1/sqrt(2)  | "<<M_SQRT1_2;
    cout<<"\nValue of 2/sqrt(PI) | "<<M_2_SQRTPI;
    cout<<"\nPositive Infinity   | "<<HUGE_VAL;
    cout<<"\n———————————————————————————————————————————\n";
    return 0;
}

kodingwindow@kw:~$ g++ kw.cpp
kodingwindow@kw:~$ ./a.out
———————————————————————————————————————————
Program to use the math library functions
———————————————————————————————————————————
Value of PI         | 3.14159
Value of PI/2       | 1.5708
Value of PI/4       | 0.785398
Value of 1/PI       | 0.31831
Value of 2/PI       | 0.63662
Value of log2e      | 1.4427
Value of log10e     | 0.434294
Value of Nlog2      | 0.693147
Value of Nlog10     | 2.30259
Value of sqrt(1/2)  | 1.41421
Value of 1/sqrt(2)  | 0.707107
Value of 2/sqrt(PI) | 1.12838
Positive Infinity   | inf
———————————————————————————————————————————
kodingwindow@kw:~$