March 19th 2025
12:28:41 PM
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March 19th 2025 12:28:41 PM |
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What is your name? |
jabari |
Where are you from? |
illinois |
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thank you so much! came for graph transformations and plan on staying for much more; amazing resource you\'ve put together! thanks again!! |
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March 8th 2025 09:30:00 PM |
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What is your name? |
Sarah <3 |
Where are you from? |
Massachusetts, moved to the midwest recently |
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i hope whoever reads this is successful in both their job + academically. keep trying until you succeed!! <3 |
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February 12th 2025 09:11:19 AM |
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What is your name? |
emily |
Where are you from? |
oregon |
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yo thanks this helped me last minute for a math test |
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January 23rd 2025 10:55:33 PM |
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What is your name? |
Lily |
Where are you from? |
North Carolina |
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Heeellllooooooooooooooooooooooooooooo! I really love that there are unlimited precalculus problems. This is incredible. |
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December 29th 2024 09:05:59 AM |
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What is your name? |
Richard Sonnenfeld |
Where are you from? |
Socorro, New Mexico |
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Paraphrasing Pedrotti\'s Optics, it is obvious by Fermat\'s principle and the definition of an ellipse that \"A\" an object placed at one focus of an ellipse will produce an image at the other focus. Also, \"B\", an object placed at one focus of a hyperbola will produce a virtual image at the other focus. Statement A \"is\" obvious based on definition that ellipse is locus of points such that sum of distances from foci to a point on the ellipse is a constant. Statement \"B\" is not the least bit obvious. You do not use Fermat\'s principle. Instead you use angle of incidence equals angle of reflection ... you produce a real image (by using the \"back\") of the hyperboloid and your result is beautiful. Thank you!!! |
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December 12th 2024 09:17:52 AM |
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What is your name? |
fred |
Where are you from? |
iowa, usa |
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Hello hello |
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December 9th 2024 04:07:06 PM |
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What is your name? |
Isla |
Where are you from? |
us |
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😁 |
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December 7th 2024 01:21:54 AM |
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What is your name? |
thaji |
Where are you from? |
jaffna, sri lanka |
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thank you very much for making that course |
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November 30th 2024 05:30:14 PM |
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What is your name? |
Paprikha |
Where are you from? |
Toronto, Ontario, Canada. |
Post a message: |
niiiicccceeee site |
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October 27th 2024 08:12:22 AM |
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What is your name? |
Mark |
Where are you from? |
Poland |
Post a message: |
Thank you for creating this website, it\'s of great help when you try to grasp a new concept! |
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