\fHaLE Angles MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the exact value by using a halfangle identity. 1) sin 225 20%1215 8% 2+4? 29% 245 B)%x}1+d . 11' 3)sm12 1 leg:- 25 BE \"'5 . 51: 4)sm12 mi 2N? B) 2\"\"15 Name C)%I2+l D}-%m 0% 2+~J 13% _1-\\IE C]%_1-J D)%}+l C) 245 D 2'45 1) 2) 3) 4)