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