Postfix Notation is a different method of writing equations. Instead of putting operators between the numbers they act on, you put an operator after the numbers it acts on. Numbers next to each other are separated by a semicolon (;). Negative numbers are denoted with an underscore (_) instead of a minus sign (-) to differentiate them from subtraction. Examples of postfix notation: 3;2+ (3+2) (=5) 12;2/8+ (12/2+8) (=14) 10;2+2* ((10+2)*2) (=24) Press C to clear the equation history Press H to show/hide the list of supported operators Press SPACE to enter a new expression SUPPORTED OPERATORS: Two Inputs Note: op2 refers to the number right before the operator, and op1 refers to the number before op2 + (ADD): sum of op1 and op2 - (SUBTRACT): difference of op1 and op2 * (MULTIPLY): product of op1 and op2 / (DIVIDE): quotient of op1 and op2 ^ (POWER): op1 raised to op2 in the exponent rt (ROOT): the op2 root of op1 % (MODULO): the remainder of op1 and op2 log (LOGARITHM): log base op2 of op1 One Input @ (SQUARE): multiply the input by itself sq (SQUARE ROOT): take the square root of the input sin (SINE): sin of input cos (COSINE): cosine of input tan (TANGENT): tangent of input asin (ARCSINE): inverse of the sin function acos (ARCCOSINE): inverse of the cos function atan (ARCTANGENT): inverse of the tan function rnd (ROUND): round the input flr (FLOOR): round down the input ceil (CELING): round up the input abs (ABSOLUTE VALUE): covert negative to positive ln (NATURAL LOG): log of the input base e rcl (RECALL): get the result from memory that corresponds to the input (i.e. 1 returns the previous result, 2 returns the result before that, etc.) No inputs (constants) e (E): Euler's number (2.71828...) pi (PI): the circle constant (3.14159...) ans (ANSWER): the previous result
