Problem
To find the cosine and sine values for every 10 degrees from 0 to 150.
Solution
The logic used to find the cosine values is as follows −
Declare MAX and PI value at the starting of a program
while(angle <= MAX){
x = (PI/MAX)*angle;
y = cos(x);
printf("%15d %13.4f\n", angle, y);
angle = angle + 10;
}The logic used to find the sine values is as follows −
Declare MAX and PI value at the starting of a program.
while(angle <= MAX){
x = (PI/MAX)*angle;
y = sin(x);
printf("%15d %13.4f\n", angle, y);
angle = angle + 10;
}Example
Following is the C program to find the cosine values −
//cosine values
#include<stdio.h>
#include <math.h>
#define PI 3.1416
#define MAX 150
main ( ) {
int angle;
float x,y;
angle = 0;
printf("Angle cos(angle)\n\n");
while(angle <= MAX) {
x = (PI/MAX)*angle;
y = cos(x);
printf("%15d %13.4f\n", angle, y);
angle = angle + 10;
}
}Output
When the above program is executed, it produces the following output −
Angle cos(angle) 0 1.0000 10 0.9781 20 0.9135 30 0.8090 40 0.6691 50 0.5000 60 0.3090 70 0.1045 80 -0.1045 90 -0.3090 100 -0.5000 110 -0.6691 120 -0.8090 130 -0.9135 140 -0.9781 150 -1.0000
Example
Following is the C program to find the sine values −
//sine values
#include<stdio.h>
#include <math.h>
#define PI 3.1416
#define MAX 150
main ( ){
int angle;
float x,y;
angle = 0;
printf("Angle sin(angle)\n\n");
while(angle <= MAX){
x = (PI/MAX)*angle;
y = sin(x);
printf("%15d %13.4f\n", angle, y);
angle = angle + 10;
}
}Output
When the above program is executed, it produces the following output −
Angle sin(angle) 0 0.0000 10 0.2079 20 0.4067 30 0.5878 40 0.7431 50 0.8660 60 0.9511 70 0.9945 80 0.9945 90 0.9511 100 0.8660 110 0.7431 120 0.5878 130 0.4067 140 0.2079 150 -0.0000