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- .SET #8(*4, *)
- .LET (*#34=#34+#8*) TEXT
- .LET (*#24=#24+#6*)
- @LAB:SCREEN44
- .SCR 0
- .SNA(*(.INF 39)0*)
- .COL 7,0
- .LOC 2,46(*44*)
- .COL 0,3
- .LOC 5,10(* Parametric Form of the Parabola *)
- .PAU(**) #4
- .COL 14,0
- .LOC 7,11(*The conics form part of a set of curves which are represented*)
- .LOC 9,11(*conveniently in parametric form.*)
- .PAU(**) #4
- .LOC 9,44(*Parametric form is when the*)
- .LOC 11,12(*coordinate values x and y are each expressed in terms of a*)
- .LOC 13,27(*third variable - often t.*)
- .PAU(**) #4
- .COL 10,0
- .LOC 16,11(*The parabola can be represented this way as:*)
- .PAU(**) #4
- .COL 11,0
- .LOC 19,29(*x = at² y = 2at*)
- .SPE PLAY (*AM050421.SPE*) WAIT
- .PAU(**) #4
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- @LAB:SCREEN45
- .SNA(*(.INF 39)0*)
- .COL 7,0
- .LOC 2,46(*45*)
- .COL 11,0
- .LOC 4,11(*┌──────────────────┐*)
- .LOC 5,11(*│ x = at² y = 2at │*)
- .LOC 6,11(*└──────────────────┘*)
- .PAU(**) #4
- .COL 14,0
- .LOC 8,11(*If you eliminate t from these:*)
- .PAU(**) #4
- .COL 10,0
- .LOC 8,45(*t =*)
- .LOC 7,50(*y*)
- .LOC 8,49(*──*)
- .LOC 9,49(*2a*)
- .PAU(**) #4
- .COL 14,0
- .LOC 8,55(*»*)
- .COL 10,0
- .LOC 8,58(*x = a.*)
- .LOC 7,64(*┌ y ┐²*)
- .LOC 9,64(*└ 2a ┘*)
- .LOC 8,64(*│ ── │*)
- .PAU(**) #4
- .COL 14,0
- .LOC 12,40(*»*)
- .COL 10,0
- .LOC 12,45(*x = a.───*)
- .LOC 11,52(*y²*)
- .LOC 13,51(*4a²*)
- .PAU(**) #4
- .COL 14,0
- .LOC 15,40(*»*)
- .COL 11,0
- .LOC 15,44(*y² = 4ax*)
- .LOC 16,44(*────────*)
- .PAU(**) #4
- .COL 10,0
- .LOC 19,16(*x = at², y = 2at are called the parametric form of*)
- .LOC 21,30(*the parabola y² = 4ax*)
- .SPE PLAY (*AM050422.SPE*) WAIT
- .COL 0,3
- .LOC 24,64(*C / R >>*)
- @SIN(*"C"=L:SCREEN46,"c"=L:SCREEN46,"R"=L:-SCREEN44,"r"=L:-SCREEN44*)
- @LAB:SCREEN46
- .SNA(*(.INF 39)0*)
- .COL 7,0
- .LOC 2,46(*46*)
- .COL 12,0
- .LOC 5,11(*For example:*)
- .PAU(**) #4
- .COL 14,0
- .LOC 7,15(*Given x = 10t² y = 20t*)
- .PAU(**) #4
- .COL 10,0
- .LOC 9,27(*= 10.t² = 2.10.t*)
- .PAU(**) #4
- .COL 14,0
- .LOC 9,59(*»*)
- .COL 10,0
- .LOC 9,63(*a = 10*)
- .PAU(**) #4
- .LOC 11,25(*y² = 4.a.x*)
- .PAU(**) #4
- .COL 14,0
- .LOC 11,40(*»*)
- .COL 11,0
- .LOC 11,44(*y² = 40x*)
- .LOC 12,44(*────────*)
- .PAU(**) #4
- .COL 14,0
- .LOC 14,15(*Given y² = 36x*)
- .PAU(**) #4
- .LOC 14,40(*»*)
- .COL 10,0
- .LOC 14,44(*y² = 4.9.x*)
- .PAU(**) #4
- .COL 14,0
- .LOC 14,59(*»*)
- .COL 10,0
- .LOC 14,63(*a = 9*)
- .PAU(**) #4
- .COL 11,0
- .LOC 16,25(*x = 9t² y = 18t*)
- .LOC 17,25(*──────────────────────*)
- .PAU(**) #4
- .COL 14,0
- .LOC 19,11(*Given that x = 4t², y = 8t becomes y² = cx*)
- .PAU(**) #4
- .COL 10,0
- .LOC 21,15(*The value of c is*)
- @BEG NOCOUNT
- .LET(*#5=#5+#6*)
- .LOC 21,33
- @REA(*>*)
- @RIG(*4*)DECIMAL
- .COL 12,0
- .LOC 21,40(*Correct, well done.*)
- @END
- @IF RIGHT L:RIGHT46
- @EQU(*#5>#6*):TWICEWRONG46
- .COL 13,0
- .LOC 21,40(*Incorrect, have a look at the*)
- .LOC 22,40(*previous example.*)
- .PAU(**) #2
- @GOB:SCREEN44
- @LAB:TWICEWRONG46
- .COL 27,0
- .LOC 21,40(*Incorrect, consult your tutor*)
- .COL 10,0
- .SET #5(*0*)
- .SET #10(*SCREEN46Z*)
- .PAU(**) #4
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- @GOT:SCREEN47
- @LAB:SCREEN46Z
- .SCR 1
- .PUT PART=(*AM0504.LIB*)
- @GOT:SCREEN47
- @LAB:RIGHT46
- .SET #5(*0*)
- .PUT 250,187 PART=3 PSET
- .PAU(**)
- @LAB:SCREEN47
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*47*)
- .LOC 5,11(*Tangent and Normal at (at²,2at)*)
- .DRA(*BM73,28C3R259D14L259U14*)
- .PAU(**) #4
- .LOC 5,50(*Given the parabola y² = 4ax*)
- .PAU(**) #4
- .LOC 8,11(*Differentiate:*)
- .PAU(**) #4
- .LOC 8,33(*2y.*)
- .PUT 280,51 PART=20
- .LOC 8,40(*= 4a*)
- .PAU(**) #4
- .LOC 8,50(*»*)
- .PUT 424,51 PART=20
- .LOC 8,58(*=*)
- .LOC 7,60(*2a*)
- .LOC 8,60(*──*)
- .LOC 9,61(*y*)
- .PAU(**) #4
- .LOC 8,63(*=*)
- .LOC 7,65(*2a*)
- .LOC 8,65(*───*)
- .LOC 9,65(*2at*)
- .PAU(**) #4
- .LOC 8,69(*=*)
- .LOC 7,72(*1*)
- .LOC 8,72(*─*)
- .LOC 9,72(*t*)
- .PAU(**) #4
- .LOC 12,15(*Gradient of tangent =*)
- .PUT 304,86 PART=28
- .PAU(**) #4
- .LOC 12,46(*Gradient of normal = - t*)
- .PAU(**) #4
- .LOC 15,15(*Tangent is:*)
- .PAU(**) #4
- .LOC 15,31(*y - 2at =*)
- .PUT 336,110 PART=28
- .LOC 15,44(*.(x - at²)*)
- .PAU(**) #4
- .LOC 18,25(*»*)
- .LOC 18,30(*ty - 2at² = x - at²*)
- .PAU(**) #4
- .LOC 21,25(*»*)
- .LOC 21,32(*ty - x = at²*)
- .DRA(*BM238,156C3R128D16L128U16*)
- .PAU(**) #4
- .USE PROG=PAUSE.USE
- .WIP (4,2)-(23,79) #7
- .LOC 2,46(*47a*)
- .LOC 16,15(*Normal is:*)
- .PAU(**) #4
- .LOC 16,30(*y - 2at = - t.(x - at²)*)
- .PAU(**) #4
- .LOC 18,24(*»*)
- .LOC 18,30(*y - 2at = - tx + at*)
- .PUT 384,134 PART=29
- .PAU(**) #4
- .LOC 21,24(*»*)
- .LOC 21,31(*y + tx = 2at + at*)
- .PUT 376,158 PART=29
- .DRA(*BM389,155C3L158D17R158U17*)
- .SPE PLAY (*AM050423.SPE*) WAIT
- .PUT 500,187 PART=2 PSET
- @SIN(*"C"=L:SCREEN48,"c"=L:SCREEN48,"R"=L:-SCREEN47,"r"=L:-SCREEN47*)
- @LAB:SCREEN48
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*48*)
- .LOC 5,11(*For example:*)
- .PAU(**) #4
- .LOC 7,15(*Find the equation of the tangent and the normal to the*)
- .LOC 9,15(*parabola y² = 16x at the point with parameter t = -3*)
- .USE PROG=PAUSE.USE
- .LOC 11,5(*Tangent*)
- .PAU(**) #4
- .LOC 11,15(*Use ty - x = at²:*)
- .PAU(**) #4
- .LOC 11,47(*-3.y - x = 4.(-3)²*)
- .PAU(**) #4
- .LOC 11,70(*[ a = 4 ]*)
- .PAU(**) #4
- .LOC 13,32(*»*)
- .LOC 13,47(*- 3y - x = 36*)
- .PAU(**) #4
- .LOC 15,32(*»*)
- .LOC 15,47(*x + 3y + 36 = 0*)
- .DRA (*C3BM368,121M490,121*)
- .USE PROG=PAUSE.USE
- .LOC 17,5(*Normal*)
- .PAU(**) #4
- .LOC 17,15(*Use y + tx = 2at + at*)
- .PUT 288,126 PART=29
- .LOC 17,38(*:*)
- .PAU(**) #4
- .LOC 17,43(*y + -3.x = 2.4.(-3) + 4.(-3)*)
- .PUT 576,126 PART=29
- .PAU(**) #4
- .LOC 19,32(*»*)
- .LOC 19,44(*y - 3x = - 24 - 108*)
- .PAU(**) #4
- .LOC 21,32(*»*)
- .LOC 21,44(*y - 3x + 132 = 0*)
- .DRA (*C3BM344,169M472,169*)
- .PAU(**) #4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN49
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*49*)
- .LOC 7,5(*At this point in the full version*)
- .LOC 9,9(*of the program the user is*)
- .LOC 11,5(*requested to complete a worksheet*)
- .LOC 13,6(*for this section, entering the*)
- .LOC 15,7(*results via the keyboard onto*)
- .LOC 17,9(*the computer for checking.*)
- .PAU(**)#4
- .LOC 19,6(*Type C <enter> to continue.*)
- .SET #10(*SCREEN50*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN50
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*50*)
- .LOC 6,4(*However, in this demonstration the*)
- .LOC 8,7(*results checking facility is*)
- .LOC 10,4(*unavailable, so you will continue to*)
- .LOC 12,6(*the next phase of the tutorial.*)
- .PAU(**)#4
- .LOC 18,6(*Type C <enter> to continue.*)
- .SET #10(*SCREEN51Z*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN51Z
- .WIP (20,2)-(23,39)
- .PAU(**) #4
- .COL 1,
- .LOC 14,8(*Do you wish to:*)
- .COL 2,
- .LOC 16,4(*(C) continue to the next Part*)
- .LOC 18,4(*(R) return to the Contents page*)
- .COL 1,
- .LOC 20,8(*Please type C or R >*)
- .COL 3,
- @SIN (*"C"=C:AM0504F.CHA,"c"=C:AM0504F.CHA,"R"=L:BACKB,"r"=L:BACKB*)
- @LAB:BACKB
- @GOB:SCREEN09 PROG=AM0504
-
-