HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 132

In RPN mode: „À1.35` 0.25`„¼ 0.85`„¾ 1.35`„À All the functions described above, namely, ABS, SQ, √, ^, XROOT, LOG, ALOG, LN, EXP, SIN, COS, TAN, ASIN, ACOS, ATAN, can be combined with the fundamental operations (+-*/) to form more complex expressions. The Equation Writer, whose operations is described in Chapter 2, is ideal for building such expressions, regardless of the calculator operation mode. Differences between functions and operators Functions like ABS, SQ, √, LOG, ALOG, LN, EXP, SIN, COS, TAN, ASIN, ACOS, ATAN require a single argument. Thus, their application is ALG mode is straightforward, e.g., ABS(x). Some functions like XROOT require two arguments, e.g., XROOT(x,y). This function has the equivalent keystroke sequence ,». Operators, on the other hand, are placed after a single argument or between two arguments. The factorial operator (!), for example, is placed after a number, e.g., 5~,2`. Since this operator requires a single argument it is referred to as a unary operator. Operators that require two arguments, such as + - * / Q, are binary operators, e.g., 3*5, or 4Q2. Real number functions in the MTH menu The MTH (MaTHematics) menu include a number of mathematical functions mostly applicable to real numbers. To access the MTH menu, use the keystroke combination „´. With the default setting of CHOOSE boxes for system flag 117 (see Chapter 2), the MTH menu is shown as the following menu list: Page 3-7