... you want to do and then ATAN ATANZ ATANH 1 ~AVERAGEA Figure 4.5 78 A Guide to Microsoft Excel 2002 for Scientists and Engineers 1 2 3 4 Exercise 3: Quadratic Equation ... that TRUE and FALSE values are numerically equivalent to 1 and 0, respectively. (a) =IF (AND (A2 >0, A2 4 I), A2 , NA()) The value A2 is returned if A2 is greater than 0 and less than ... =AND (A1 >5 ,A2 >5) 20 =A3 >20 =OR (A1 >15 ,A2 >15) 30 =NOT (A1 =10) =A3 =Al +A2 (a) Insert a new sheet, Sheet4, in CHAP5.XLS. Enter the values and formulas as shown in Figure 5.7 and...