Thread: Need help for solving a function.

How can I multiply x with y? I mean I have to find AREA between function line and X-Axis.

Exercise is like this:
Function: y=tan(x/2) -> tan(x/2)
Determination area: 0,2<x<1,55

Code:

#include<stdio.h>
#include<math.h>
#include<conio.h>


int main()
{
float x,y,sum;


for(x=0.2; x<1.55;x*tan(x/2)){ 
        x = x + 0.0135*(x*tan(x/2));
        y =tan(x/2);
        sum=
        printf("%f %f\n",x,y);
    }
        printf("Answer is: %f\n",sum);
    _getch();
    return 0;


}