Question

2) Write a C++ program that uses a class called “Degree” to obtain the trigonometric
values for angles given in degrees. This is because the trigonometric functions
defined in the library file <cmath> are applied to radian angles only. Use the constant
DEG2RAD = 0.017453 for conversion from degrees to radians. This class must
include a constructor, destructor, and the following functions:
a. void set_value(double)
b. double get_value()
c. double get_sine()
d. double get_cosine()
e. double get_tangent()
f. void read_value()
Your main function should simply demonstrate the use of this class, i.e., prompt a
user for an angle in degrees and display the sine, cosine and tangent of that angle.

Answer 1

#include<iostream>
#include<cmath>
using namespace std;

double DEG2RAD = 0.017453;

class TrigonometryCalculator

{

public:

double value;

double radValue;

//constructor

TrigonometryCalculator(double x)

{

radValue = x*DEG2RAD;
value = x;

}

void set_value(double x)

{

radValue = x*DEG2RAD;

value = x;

}

void read_value(double x)

{

cout<<"Value: "<<value<<endl;

}

double get_value()
{

return value;

}

//get Sine of the angle

double get_sine()

{

return sin(radValue);

}

//get Cosine of the angle

double get_cosine()

{

return cos(radValue);

}

//get tangent of the angle

double get_tangent()

{

return tan(radValue);

}

//Destructor

~TrigonometryCalculator()

{

cout<<"Destructor Called."<<endl;

}

};

//Driver Function

int main()

{

// An object of TrigonometricCalculator is made
TrigonometryCalculator A(30); //angle of 30 degrees is passed
cout<<"Sine of 30 degree is : "<<A.get_sine()<<endl;
cout<<"Cosine of 30 degree is : "<<A.get_cosine()<<endl;
cout<<"Tangent of 30 degree is : "<<A.get_tangent()<<endl;

}

Output: