try this
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Rex Boggs
Feb 14, 2008, 2:45:46 PM2/14/08
to tinspire
On your Graphs and Geometry screen:
Turn axes off: (Menu, View, Hide Axes)
Set the window: (Menu, Window, Window Settings)
Xmin: -1.88 Xmax: 1.88 Ymin: -1.7 Ymax: 1.7
Enter these two functions:
f1(x) = abs(x) - sqrt(1-x^2)
f2(x) = abs(x) + sqrt(1-x^2)
Turn axes off: (Menu, View, Hide Axes)
Set the window: (Menu, Window, Window Settings)
Xmin: -1.88 Xmax: 1.88 Ymin: -1.7 Ymax: 1.7
Enter these two functions:
f1(x) = abs(x) - sqrt(1-x^2)
f2(x) = abs(x) + sqrt(1-x^2)
Challenge to all you TI-Nspire gooroos out there:
This works (with some slight modifications) on a TI-8x as well.
What can we do with it in TI-Nspire to jazz it up a bit?
Cheers
Rex
Steve Arnold
Feb 14, 2008, 3:58:09 PM2/14/08
to tins...@googlegroups.com, Steve Arnold
Yes, that is very sweet Rex - happy Valentine's day to you too!
Steve
With best wishes,
Steve
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Texas Instruments Content and Product Support
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S. Turk
Feb 14, 2008, 4:48:35 PM2/14/08
to tinspire
It's not all that jazzy, exactly, but since I'm now covering
parametric equations in several of my classes we used those to put
arrows through heart graphs pretty much all day. They had a lot of
fun with it. Use the segment tool as a guide for the shaft of the
arrow, then find the intersection points, then get the coordinates of
the end points of the shaft and the intersection points, etc. It was
a very cool lesson and the students were very excited about it. It's
nice because we could enter each of the equations and specify the tmin
and tmax for each all on the same screen at the same time. Pretty
much just writing equations of lines but they'd never really had an
experience like it before. Good stuff...and happy Valentine's Day to
all.
~S. Turkington
parametric equations in several of my classes we used those to put
arrows through heart graphs pretty much all day. They had a lot of
fun with it. Use the segment tool as a guide for the shaft of the
arrow, then find the intersection points, then get the coordinates of
the end points of the shaft and the intersection points, etc. It was
a very cool lesson and the students were very excited about it. It's
nice because we could enter each of the equations and specify the tmin
and tmax for each all on the same screen at the same time. Pretty
much just writing equations of lines but they'd never really had an
experience like it before. Good stuff...and happy Valentine's Day to
all.
~S. Turkington
Sean Bird
Feb 14, 2008, 6:39:53 PM2/14/08
to tins...@googlegroups.com
Put a POINT ON the x-axis (Menu, Points & Lines)
Find the coordinates (Menu, Actions)
Store the x-coordinate as b. "Right click" on the x value (Ctrl + Menu), choose store.
Change both of the functions to f2(x)=abs(x-b)+√(1-(x-b)^(2)) and the other one negative sqrt
Right click on point b. Choose ATTRIBUTES, arrow down one & press 1 (or 2 or 3 depending on how fast you want it to go).
Menu, 5:Trace, 3:Geometry trace. Click on top & bottom. This will make an interesting design as the heart moves across the page.
Now to make the heart go in a circle or heart shape. Who want to explain that one?--
Sean Bird
AP Physics & Calculus,
NHS Adviser & Rocket Team Supervisor
Covenant Christian High School
7525 West 21st Street
Indianapolis, IN 46214
Phone: 317/390.0202 x104 Fax: 317/390.6823
Website: http://cs3.covenantchristian.org/bird
work Email: sean...@covenantchristian.org
personal Email: covena...@gmail.com
Psalm 111:2 "Great are the works of the LORD, studied by all who delight in them."
Find the coordinates (Menu, Actions)
Store the x-coordinate as b. "Right click" on the x value (Ctrl + Menu), choose store.
Change both of the functions to f2(x)=abs(x-b)+√(1-(x-b)^(2)) and the other one negative sqrt
Right click on point b. Choose ATTRIBUTES, arrow down one & press 1 (or 2 or 3 depending on how fast you want it to go).
Menu, 5:Trace, 3:Geometry trace. Click on top & bottom. This will make an interesting design as the heart moves across the page.
Now to make the heart go in a circle or heart shape. Who want to explain that one?
Sean Bird
AP Physics & Calculus,
NHS Adviser & Rocket Team Supervisor
Covenant Christian High School
7525 West 21st Street
Indianapolis, IN 46214
Phone: 317/390.0202 x104 Fax: 317/390.6823
Website: http://cs3.covenantchristian.org/bird
work Email: sean...@covenantchristian.org
personal Email: covena...@gmail.com
Psalm 111:2 "Great are the works of the LORD, studied by all who delight in them."
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