I hardly know any math, but I put this together by looking at other suggestions. It feels a bit roundabout, although I can’t put my finger on it. At least it gets the desired result.

[code]#include <stdio.h>

// Including math library

#include <math.h>

int main (int argc, const char * argv[])

{

```
// Declaring x to be 1.0
double x = (1.0);
// Declaring variable "result" to be sin(x).
double result = sin(x);
// Prints the variable "result" with 3 decimals.
printf("The sine of 1 radian is %.3f.\n", result);
return 0;
```

}[/code]