You can also remove ending parenthesis and quotes to save on memory.

P.S. In the future you should omit the colons at the beginning of each line of your code, since they don't make code easier to read and they take up space on the calculator. Also list the type of calculator you are using and OS version.

]]>PROGRAM:UNITCIRC

` ``:ClrHome :Menu("ANGLE MODE","DEGREE",1,"RADIAN",2) :Lbl 1 :Degree :Goto 3 :Lbl 2 :Radian :Lbl 3 :Input "MEASURE: ",M :ZStandard :ZSquare :AxesOff :Circle(0,0,9,BLUE) :Line(0,0,P▶Rx(9,M),P▶Ry(9,M),RED)`

` ``:Lbl 10 :ClrHome :Menu("UNIT CIRCLE","CONVERSIONS",11,"UNIT CIRCLE",3,"QUIT",4) :Lbl 11 :ClrHome :Menu("CONVERSIONS","DEGREES -> RADIANS",1,"RADIANS -> DEGREES",2,"BACK",10) :Lbl 1 :Input "DEGREE MEASURE: ",D :Radian :Disp Dº :Pause :Goto 11 :Lbl 2 :Input "RADIAN MEASURE :",R :Degree :Disp R^^r^^ :Pause :Goto 11 :Lbl 3 :ClrHome :Menu("UNIT CIRCLE FUNCTIONS","ANGLE FROM DEGREE",5,"ANGLE FROM RADIAN",6,"ANGLE FROM COORDINATE",7,"BACK",10) :Lbl 5 :Input "DEGREE MEASURE: ",A :Degree :Goto 9 :Lbl 6 :Input "RADIAN MEASURE: ",A :Radian :Goto 9 :Lbl 7 :Input "X=",X :Input "Y=",Y :Degree :R▶Pθ(X,Y)→A :Lbl 9 :StoreGDB 1 :ClrDraw :AxesOff :ZStandard :ZSquare :Horizontal 0,BLACK :Vertical 0,BLACK :Circle(0,0,9,BLUE) :Line(0,0,P▶Rx(9,A),P▶Ry(9,A),RED) :Pause :RecallGDB 1 :Goto 3 :Lbl 4 :Stop`