What will be the output of the following C code?#include

What will be the output of the following C code?

#include <stdio.h>
    #include <math.h>
    int main()
    {
        int n = 90;
        printf("%f\n", sin(n));
        return 0;
    }

1. Undefined behaviour
2. 1.000000
3. Compilation Error
4. 0.893997
5. None of these

0.893997