17 18 19 20 21 22 23 7285 24 26 The original coordinates of the point in polor coordinates are X'-r cos (+0) and Yor cos (+0) 29 30 A decoder is a combinational circuit that converts binary information from n input lines to a maximum of 2" unique output lines. If the n-bit decoded information has unused or don't-care combinations, the decoder output will have less than 2" outputs. The circular link linear list used to reduce the space of memory Sum of Products (SOP) is a Boolean expression containing AND terms, called product terms, of one or more literals each. The sum denotes the ORing of these terms. An example of a function expressed as a sum of product is Fl-y+xy+xyz' In Bresenham's fine algorithm, if the distances dl