... 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 ... return values in radians. The formulas in D9 and D10 convert the radian values to degrees. Carefully note the differences between ATAN and ATAN2: ATAN Uses the form ATAN(opposite / adjacent)...