Help with rotation formula

1

at the moment it is not working at top left correct(about 10˚ of rotation at about 180˚ off) and bottom left is inverted (180˚ to much). I had all but top left working but when fixing that I broke the bottom left.
It should make a top view of a man rotate to face the mouse. 0 rotation of the man he is facing down, this was unintentional the code was intended to make him face up but I didn’t mind
This code is for a RPG that I am making for a beginner’s flash class

http://www.ping.be/~ping1339/gonio.htm (I added this link coz this is the referents I used to refresh my understanding of Trigonometry. Might be useful for some keen people)

onClipEvent (load){
Cx = Stage.width/2
Cy = (Stage.height/2)- 30 //the 30 is to les on the inpact of the interface

}
on (release){

//rotashon of man
if (_xmouse >Cx && _ymouse>=Cy){ //betwen 0 and 89 top right θ./_|
    Radian= ((Math.PI/2) - Math.atan(  (_ymouse-Cy)/(_xmouse-Cx)  ))
}
if (_xmouse >=Cx && _ymouse<Cy){//betwen 90 and 179 botom right θ`|_\
    Radian=(Math.PI/2) +((Math.PI/2) - (Math.atan((_xmouse-Cx)/(Cy-_ymouse))))
}
if (_xmouse <Cx && _ymouse<=Cy){//betwen 180 and 269 botom left /_|`&#952;

    Radian=(Math.PI/2) + (Math.atan((_xmouse+Cx)/(Cy-_ymouse)))
}

if (_xmouse &lt;= Cx && _ymouse &gt; Cy){//betwen 270 and 359 top left |_\.&#952;
    //Radian=((2*Math.PI) + ((Math.atan((_ymouse-Cy)/(Cx-_xmouse)))))
    Radian=((2*Math.PI)+(Math.PI/2) + ((Math.atan((_ymouse-Cy)/(Cx-_xmouse)))))
    
}
_global.man_angal= Radian*(360/(2*Math.PI)) //convert Radians to Degree
    
    
trace("Radian              "+Radian)
trace("man_angal in deges  "+_global.man_angal)

//send moveing instrucshons
if (((Cx + 10)> _xmouse)||(Cx - 10)< _xmouse) {//test for minamin movement
_global.moveX = (_xmouse-Cx)//send moveing instrucshons
}
if (((Cy + 10)> _ymouse) || (Cy - 10)< _ymouse) {//test for minamin movement
_global.moveY = (_ymouse-Cy)
}

}

2

have fixed it now
For any one that is interested here is the code now:

    //rotashon of man
    if (_xmouse >Cx && _ymouse>=Cy){ //betwen 0 and 89 top right &#952;./_|
    trace("top right")
        Radian= ((Math.PI/2) - Math.atan(  (_ymouse-Cy)/(_xmouse-Cx)  ))
    }
    if (_xmouse >=Cx && _ymouse<Cy){//betwen 90 and 179 botom right &#952;`|_\
    trace("botom right")
        Radian=(Math.PI/2) +((Math.PI/2) - (Math.atan((_xmouse-Cx)/(Cy-_ymouse))))
    }
    if (_xmouse &lt;Cx && _ymouse&lt;=Cy){//betwen 180 and 269 botom left /_|`&#952;
trace("botom left")
        Radian=(Math.PI) + (Math.atan((Cx-_xmouse)/(Cy-_ymouse)))
    }
    
    if (_xmouse <= Cx && _ymouse > Cy){//betwen 270 and 359 top left |_\.&#952;
trace("top left")
        //Radian=((2*Math.PI)+(Math.PI/2) + ((Math.atan((_ymouse-Cy)/(Cx-_xmouse)))))
        Radian=( -(Math.PI/2)+((Math.atan((_ymouse-Cy)/(Cx-_xmouse)))))
        
    }
    _global.man_angal= Radian*(360/(2*Math.PI)) //convert Radians to Degree

but i don’t really understand how what i did fixed it. i changed [COLOR=#000000]COLOR=#007700[/COLOR][/COLOR][COLOR=#000000][COLOR=#007700]+[/COLOR][/COLOR][COLOR=#000000]COLOR=#007700[/COLOR][/COLOR]with[COLOR=#000000][COLOR=#007700]-([/COLOR][COLOR=#0000bb]Math[/COLOR][COLOR=#007700].[/COLOR][COLOR=#0000bb]PI[/COLOR][COLOR=#007700]/[/COLOR][COLOR=#0000bb]2[/COLOR][COLOR=#007700])[/COLOR][/COLOR] this is -90° rather than +270° which should give the same orientation in positive ° as apposed to negative