USA_flag.tns

[Sean Bird]

Happy Independence Day on this 248th birthday of the USA.

[The TI-Nspire Google Group Website is active again: https://sites.google.com/site/tinspiregroup/ There is still work to be done to update/improve it, but the files we had there are available again.]

Today I was wrapping up a virtual TI-Nspire workshop - Teaching and Learning High School Mathematics - and the topic was transformations. So I recreated a file I had made several years ago. (I know you can make it with cool programs in TI-Basic or with Python, but using the graph page still such educational/pedagogical benefits.

 

f1(x) = sin(0.5(x+USA))

f2(x) = f1(x)+{1,2,3,4,5,6,7,8,9,10,11,12,13}

The stars are made with a scatter plot from the list on page 1.2.

The USA slider goes from 0 to 4pi and can be animated by right-clicking on the slider (ctrl menu with the TI-Nspire handheld) and selecting Animate.

There is a little video with some of this info on my @covenantbird Instagram site.

Enjoy,

Mr. Bird

Covenant Christian High School

Indianapolis, Indiana, USA