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March 5

Going around in (trig) circles...

This image:

https://i.stack.imgur.com/s3ybv.png

from this page:

https://matheducators.stackexchange.com/questions/2423/how-to-motivate-the-geometric-definition-of-trigonometric-functions-on-the-unit

Says it came from Wikipedia, but doesn't say where.

I looked for it but the closest I could find was

https://commons.wikimedia.org/wiki/File:Circle-trig6.svg

Does anyone know where to find the first image? --Guy Macon (talk) 22:51, 5 March 2019 (UTC)[reply]

Somewhat related:

 https://math.stackexchange.com/questions/1299682/geometric-intuition-for-derivatives-of-basic-trig-functions

Try Trig Functions.svg on Wikimedia. --{{u|Mark viking}} {Talk} 23:09, 5 March 2019 (UTC)[reply]

Link: Commons:File:Trig Functions.svg. Note, it's usually a copyright violation to include a wp file in another website with out linking back to the original. Basically CC license allows you to copy for free but there are still rules to follow. --RDBury (talk) 00:06, 6 March 2019 (UTC)[reply]

Thanks! It even has an animated version: