Timeline for Proofs without words
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 17, 2016 at 0:46 | comment | added | Simply Beautiful Art | This post is very much related to this. | |
| S Nov 19, 2015 at 17:14 | history | suggested | B.N. | CC BY-SA 3.0 |
corrected image link
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| Nov 19, 2015 at 17:03 | review | Suggested edits | |||
| S Nov 19, 2015 at 17:14 | |||||
| Oct 20, 2015 at 16:05 | comment | added | Todd Trimble | @StevenGubkin If you still have it, could you put the picture back in? No one can see it. | |
| Jul 10, 2011 at 15:41 | comment | added | Steven Gubkin | Yup, I have drawn pictures for all of those as well, but this always seemed like the simplest one. Never understood why this isn't in calculus books. | |
| Jul 8, 2011 at 21:00 | comment | added | Phil Isett | Leibniz actually did this drawing. It's very nice because you can teach it to undergrads. You can do the same with any of the trig functions and their inverses. For tangent, you can extend the hypotenuse of the above triangle until it intersects the line tangent at the point $1$ (assuming this is the unit circle in the complex plane). Then you get a triangle with base $1$, height tangent, and hypotenuse secant. For cosecant and cotangent, you draw a tangent line from the point i. Then through similar triangles you can differentiate all these functions and their inverses. | |
| Feb 18, 2011 at 20:10 | history | edited | Steven Gubkin | CC BY-SA 2.5 |
added 6 characters in body; added 55 characters in body; deleted 55 characters in body
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| Nov 16, 2010 at 19:09 | comment | added | I. J. Kennedy | It looks like your image is no longer available... | |
| Nov 11, 2010 at 17:41 | history | undeleted | Ben Webster♦ | ||
| Jul 7, 2010 at 16:58 | history | deleted | Kim Morrison | ||
| Dec 15, 2009 at 1:37 | history | edited | Steven Gubkin | CC BY-SA 2.5 |
Hmm. I can't seem to get this image to display.; deleted 4 characters in body
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| Dec 15, 2009 at 1:31 | history | answered | Steven Gubkin | CC BY-SA 2.5 |