What is the exact value of sin(345°)? startfraction startroot 3 endroot startroot 2 endroot over 2 endfraction startfraction startroot 6 endroot startroot 2 endroot over 4 endfraction startfraction negative startroot 3 endroot startroot 2 endroot over 2 endfraction startfraction negative startroot negative 6 endroot startroot 2 endroot over 4 endfraction