If you mean the sine of -1, just enter "Sin(-1)".
If you mean how to do the inverse sine (Commonly denoted by "Sin-1()"), enter "asin()".
Add "a" before the trigonomic function to give it's inverse: "asin", "acos", "atan"
If you mean the sine of -1, just enter "Sin(-1)".
If you mean how to do the inverse sine (Commonly denoted by "Sin-1()"), enter "asin()".
Add "a" before the trigonomic function to give it's inverse: "asin", "acos", "atan"