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- .SET #8(*3, *)
- .LET (*#34=#34+#8*) TEXT
- .LET (*#23=#23+#6*)
- @LAB:SCREEN35
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*35*)
- .LOC 5,11(*Tangent to y² = 4ax at the point (*)
- .PUT 352,32 PART=18
- .LOC 5,47(*,*)
- .PUT 375,32 PART=19
- .LOC 5,50(*) on the parabola*)
- .DRA(*BM72,29C1R463D13L463U13*)
- .LOC 8,11(*As we found with the circle in Module 5.3, the easiest way to*)
- .LOC 10,10(*find the tangent is to find the gradient of the parabola at the*)
- .LOC 12,12(*required point by calculus and then use*)
- .LOC 12,53(*y -*)
- .PUT 448,88 PART=19
- .LOC 12,60(*= m(x -*)
- .PUT 536,88 PART=18
- .LOC 12,70(*)*)
- .PAU(**) #4
- .LOC 15,10(*Differentiate y² = 4ax implicitly:*)
- .PAU(**) #4
- .LOC 15,50(*2y.*)
- .PUT 416,107 PART=20
- .LOC 15,57(*= 4a*)
- .PAU(**) #4
- .LOC 18,43(*»*)
- .PUT 416,131 PART=20
- .LOC 18,57(*=*)
- .LOC 17,60(*4a*)
- .LOC 18,60(*──*)
- .LOC 19,60(*2y*)
- .PAU(**) #4
- .LOC 18,64(*=*)
- .LOC 17,67(*2a*)
- .LOC 18,67(*──*)
- .LOC 19,68(*y*)
- .PAU(**) #4
- .LOC 21,10(*At (*)
- .PUT 112,160 PART=18
- .LOC 21,17(*,*)
- .PUT 136,160 PART=19
- .LOC 21,20(*):*)
- .PAU(**) #4
- .LOC 21,31(*gradient = m =*)
- .LOC 20,50(*2a*)
- .LOC 21,50(*──*)
- .PUT 397,167 PART=19
- .PAU(**) #4
- .USE PROG=PAUSE.USE
- .WIP (4,2)-(23,79) #15
- .LOC 2,46(*35a*)
- .LOC 8,10(*Use y -*)
- .PUT 144,56 PART=19
- .LOC 8,22(*= m(x - )*)
- .PUT 232,56 PART=18
- .LOC 8,33(*:*)
- .PAU(**) #4
- .LOC 10,38(*y -*)
- .PUT 328,72 PART=19
- .LOC 10,45(*=*)
- .LOC 9,47(*2a*)
- .LOC 10,47(*──*)
- .PUT 373,79 PART=19
- .LOC 10,49(*.(x - )*)
- .PUT 431,72 PART=18
- .PAU(**) #4
- .LOC 13,25(*»*)
- .LOC 13,34(*y*)
- .PUT 272,96 PART=19
- .LOC 13,38(*-*)
- .PUT 320,96 PART=19
- .LOC 13,43(*² = 2ax - 2a*)
- .PUT 440,96 PART=18
- .PAU(**) #4
- .LOC 15,10(*But (*)
- .PUT 120,112 PART=18
- .LOC 15,18(*,*)
- .PUT 144,112 PART=19
- .LOC 15,21(*) lies on y² = 4ax*)
- .PAU(**) #4
- .LOC 15,47(*»*)
- .PUT 416,112 PART=19
- .LOC 15,55(*² = 4a*)
- .PUT 480,112 PART=18
- .PAU(**) #4
- .LOC 17,10(*Substituting for*)
- .PUT 208,128 PART=19
- .LOC 17,29(*²:*)
- .PAU(**) #4
- .LOC 17,33(*y*)
- .PUT 264,128 PART=19
- .LOC 17,37(*-*)
- .LOC 17,40(*4a*)
- .PUT 328,128 PART=18
- .LOC 17,45(*= 2ax - 2a*)
- .PUT 440,128 PART=18
- .PAU(**) #4
- .LOC 19,25(*»*)
- .LOC 19,40(*y*)
- .PUT 320,144 PART=19
- .LOC 19,45(*= 2ax + 2a*)
- .PUT 440,144 PART=18
- .PAU(**) #4
- .LOC 21,25(*»*)
- .LOC 21,40(*y*)
- .PUT 320,160 PART=19
- .LOC 21,45(*= 2a(x + )*)
- .PUT 432,160 PART=18
- .DRA(*BM300,157C1R162D14L162U14*)
- .SPE PLAY (*AM050419.SPE*) WAIT
- .PUT 500,187 PART=2 PSET
- @SIN(*"C"=L:SCREEN36,"c"=L:SCREEN36,"R"=L:-SCREEN35,"r"=L:-SCREEN35*)
- @LAB:SCREEN36
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*36*)
- .LOC 5,11(*For example:*)
- .PAU(**) #4
- .LOC 7,15(*Find the equation of the tangent to the parabola*)
- .LOC 9,20(*y² = 12x at the point ( 3 , -6 ).*)
- .USE PROG=PAUSE.USE
- .LOC 11,25(*y² = 12x*)
- .LOC 11,36(*»*)
- .LOC 11,40(*y² = 4.3.x*)
- .PAU(**) #4
- .LOC 11,55(*»*)
- .LOC 11,60(*a = 3*)
- .PAU(**) #4
- .LOC 13,15(*Use y*)
- .PUT 160,96 PART=19
- .LOC 13,24(*= 2a(x + ):*)
- .PUT 256,96 PART=18
- .PAU(**) #4
- .LOC 13,47(*-6.y = 2.3.(x + 3)*)
- .PAU(**) #4
- .LOC 15,36(*»*)
- .LOC 15,48(*-6y = 6x + 18*)
- .PAU(**) #4
- .LOC 17,15(*Divide through by 6:*)
- .PAU(**) #4
- .LOC 17,49(*-y = x + 3*)
- .PAU(**) #4
- .LOC 19,28(*Equation is x + y + 3 = 0*)
- .LOC 20,41(*─────────────*)
- .PAU(**) #4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN37
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*37*)
- .LOC 5,11(*The Latus Rectum*)
- .DRA(*BM70,28C1R146D14L146U14*)
- .PAU(**) #4
- .LOC 6,41(*Focal Chords*)
- .DRA (*C1BM320,48M414,48*)
- .PAU(**) #4
- .LOC 9,40(*A chord in a circle is defined*)
- .LOC 11,40(*as a line joining any 2 points*)
- .LOC 13,40(*on the circumference.*)
- .PUT 60,50 PART=21
- .PAU(**) #4
- .LOC 15,40(*We can continue with the same*)
- .LOC 17,11(*definition for the parabola - a line joining any two points*)
- .LOC 19,11(*on the parabola is called a CHORD of the parabola.*)
- .USE PROG=PAUSE.USE
- .WIP (4,2)-(23,79) #1
- .LOC 18,62(*One set of*)
- .LOC 20,11(*chords is given a special name *)
- .PAU(**) #4
- .LOC 20,43(*- those that pass through the*)
- .LOC 22,22(*focus*)
- .PAU(**) #4
- .LOC 22,29(*- they are called FOCAL CHORDS*)
- .INV 22,48,14
- .PUT 60,42 PART=22
- .SPE PLAY (*AM050420.SPE*) WAIT
- .PAU(**) #4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN38
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*38*)
- .PUT 40,30 PART=21
- .PUT 40,30 PART=22
- .LOC 6,40(*One particular focal chord -*)
- .LOC 8,40(*the one perpendicular to the*)
- .LOC 10,40(*x-axis*)
- .PAU(**) #4
- .LOC 10,48(*- is given a special*)
- .LOC 12,40(*name - the LATUS RECTUM*)
- .PUT 40,30 PART=23
- .PAU(**) #4
- .WIP (4,38)-(23,79) #2
- .LOC 12,40(*(plural LATERA RECTA)*)
- .PAU(**) #4
- .LOC 14,40(*Since the x-coordinate at S is a,*)
- .LOC 16,11(*the x-coordinate at L and*)
- .PUT 288,120 PART=24
- .LOC 16,40(*will also be a*)
- .PAU(**) #4
- .LOC 16,59(*» y² = 4.a.a*)
- .PAU(**) #4
- .LOC 18,25(*» y² = 4a²*)
- .PAU(**) #4
- .LOC 18,45(*» y = ± 2a*)
- .LOC 20,17(*L is at (a ,+ 2a) and*)
- .PUT 360,152 PART=24
- .LOC 20,49(*is at (a, - 2a)*)
- .PAU(**) #4
- .LOC 22,17(*The length of the latus rectum, L*)
- .PUT 392,168 PART=24
- .LOC 22,52(*, will be 4a*)
- .PAU(**) #4
- .PUT 500,187 PART=4 PSET
- .PAU(**)
- @LAB:SCREEN39
- .SCR 0
- .SNA(*(.INF 39)0*)
- .COL 7,0
- .LOC 2,46(*39*)
- .COL 12,0
- .LOC 5,11(*For example:*)
- .PAU(**) #4
- .COL 14,0
- .LOC 7,11(*Find the length of the latus rectum of the parabola y² = 16x*)
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- .LOC 24,64(* *)
- .COL 10,0
- .LOC 9,21(*y² = 16x*)
- .COL 14,0
- .LOC 9,34(*»*)
- .COL 10,0
- .LOC 9,38(*y² = 4.4.x*)
- .PAU(**) #4
- .COL 14,0
- .LOC 9,53(*»*)
- .COL 10,0
- .LOC 9,58(*a = 4*)
- .PAU(**) #4
- .COL 11,0
- .LOC 11,21(*Latus rectum = 4.a*)
- .PAU(**) #4
- .LOC 11,41(*= 4.4 = 16 units*)
- .LOC 12,51(*──*)
- .PAU(**) #4
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- .LOC 24,64(* *)
- .COL 14,0
- .WIP (4,2)-(23,79) #2
- .LOC 12,15(*Another example...*)
- .PAU(**) #4
- .LOC 14,15(*Find the equation of the parabola whose latus rectum*)
- .LOC 16,34(*has length 28.*)
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- .LOC 24,64(* *)
- .COL 10,0
- .LOC 18,21(*Latus rectum = 4.a*)
- .PAU(**) #4
- .LOC 18,43(*= 28*)
- .PAU(**) #4
- .COL 14,0
- .LOC 18,53(*»*)
- .COL 10,0
- .LOC 18,57(*a = 7*)
- .PAU(**) #4
- .LOC 20,21(*y² = 4.a.x*)
- .PAU(**) #4
- .COL 14,0
- .LOC 20,35(*»*)
- .COL 10,0
- .LOC 20,39(*y² = 4.7.x*)
- .PAU(**) #4
- .LOC 20,52(*= 28x*)
- .PAU(**) #4
- .COL 11,0
- .LOC 22,31(*Parabola is y² = 28x*)
- .LOC 23,31(*─────────────────────*)
- .PAU(**) #4
- .COL 0,3
- .LOC 24,64(*SPACE >*)
- .PAU(*>*)
- @LAB:SCREEN40
- .SCR 2
- .SNA(*(.INF 39)2*)
- .LOC 2,46(*40*)
- .LOC 5,11(*Another example...*)
- .PAU(**) #4
- .WIP (4,2)-(23,79)
- .LOC 5,15(*Find the length of the latus rectum for the parabola*)
- .LOC 7,34(*y² + 4y = 10x.*)
- .USE PROG=PAUSE.USE
- .LOC 10,18(*y² + 4y = 10x*)
- .LOC 10,35(*» y² + 4y + 4 = 10x + 4*)
- .PAU(**) #4
- .LOC 12,35(*»*)
- .LOC 12,42(*(y + 2)² = 10(x +*)
- .PUT 488,86 PART=25
- .LOC 12,64(*)*)
- .PAU(**) #4
- .LOC 15,52(*= 4.*)
- .PUT 448,110 PART=27
- .LOC 15,58(*.(x +*)
- .PUT 504,110 PART=26
- .LOC 15,65(*)*)
- .PAU(**) #4
- .LOC 17,35(*» a =*)
- .PUT 344,126 PART=27
- .PAU(**) #4
- .LOC 20,19(*Length of the latus rectum is 4.*)
- .PUT 400,150 PART=27
- .PAU(**) #4
- .LOC 20,53(*= 10 units*)
- .DRA (*C1BM440,160M501,160*)
- .PUT 500,187 PART=2 PSET
- @SIN(*"C"=L:SCREEN41,"c"=L:SCREEN41,"R"=L:-SCREEN37,"r"=L:-SCREEN37*)
- @LAB:SCREEN41
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*41*)
- .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(*SCREEN42*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN42
- .COL 0,0
- .SCR 1
- .SNA(*(.INF 39)1*)
- .COL 8
- .PAL 1
- .LOC 2,23(*42*)
- .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(*SCREEN43Z*)
- .USE PROG=PRESSC.USE
- @LAB:SCREEN43Z
- .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:AM0504E.CHA,"c"=C:AM0504E.CHA,"R"=L:BACKB,"r"=L:BACKB*)
- @LAB:BACKB
- @GOB:SCREEN09 PROG=AM0504
-
-