Question

. Assume that a double variable named alpha contains the value of an angle in radians. Compose a C++ statement that will display the sine of the angle so that it occupies 12 positions on the screen and displays 3 digits after the decimal point.

Answer 1

#include <iostream>

#include<cmath>

#include <iomanip>

int main() {

//delcaring variavel to store radians

double alpha = 20;

std::cout << "OUTPUT: \n\n";

//fixing the precision of the floating value.

std::cout.precision(3);

//setw(int n) is used to give a width of n spaces.

//setfill(char c) is used to fill the remaing spaces by charcater c.

std::cout << std::setfill (' ') << std::setw (12); //setting width of 12 charcater spaces in the line

std::cout << sin(alpha); //printing this value, all remaing spaces before this will be filled by setfill().

}

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