Question

Consider the equation f(x) = 2*sin(pi*x) + 3*cos(pi*x)

Write a c program that computes the values of f(x) for the following values of x: 0.25, 0.5, 1, 2. Your program should allow the user to enter the value from the standard input and the results will be displayed as follows:

/*****************************************************************/

Value of x Value of f(x)

0.25 3.5355

0.5

1

2

Answer 1

C CODE:

#include <stdio.h>

#include <math.h>

#define PI 3.1415

// Function to get value of f(x)

float f(float x){

    return 2*sin(PI*x) + 3*cos(PI*x);

}

int main(){

    // Array to store 4 values of x

    float x[4];

    // Get values of x from the user

    printf("Enter 4 values of x for which f(x) has to be found:\n");

    for(int i = 0; i < 4; i++){

        printf("\tEnter x%d: ", i+1);

        scanf("%f", &x[i]);

    }

    // Print values of f(x) for each x

    printf("\n%-12s%s\n", "Value of x", "Value of f(x)");

    for(int i = 0; i < 4; i++){

        printf("%-12.2f%.4f\n", x[i], f(x[i]));

    }

    return 0;

}

OUTPUT:

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