Timeline for Why do we need so many trigonometric definitions?
Current License: CC BY-SA 3.0
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50 events
| when toggle format | what | by | license | comment | |
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| Apr 15, 2018 at 9:22 | audit | First posts | |||
| Apr 15, 2018 at 9:23 | |||||
| Apr 5, 2018 at 1:21 | comment | added | richard1941 | You left out the trig functions from celestial navigation, versine and haversine :-) | |
| Apr 1, 2018 at 11:47 | vote | accept | Xii | ||
| Apr 1, 2018 at 8:44 | comment | added | user | @VortexYT Please remember that you can choose an answer among the given if the OP is solved, more details here meta.stackexchange.com/questions/5234/… | |
| Mar 31, 2018 at 0:02 | answer | added | Eric Towers | timeline score: 5 | |
| Mar 30, 2018 at 16:54 | history | protected | Asaf Karagila♦ | ||
| Mar 30, 2018 at 10:17 | comment | added | Nij | You should have specified which definitions of the many millions of categories you might have been talking about, as was done in latest edit. | |
| Mar 30, 2018 at 9:53 | comment | added | user202729 | A list of questions that Stack Exchange thinks is interesting and displayed on the right side panel or here. Although because the algorithm is automatic, some of them are not interesting. | They tend to get more upvotes but no more downvotes (occasionally even on wrong answers), too, because it takes 125 reputation to downvote but typical users only have 101 (association bonus), but upvotes only take 10. | |
| Mar 30, 2018 at 9:33 | comment | added | Xii | @Nij in that case what should I add? | |
| Mar 30, 2018 at 4:19 | comment | added | Nij | It's clickbait because people have no information about the content and are forced to either ignore the question or be baited into clicking to find out. | |
| Mar 29, 2018 at 22:26 | comment | added | Jair Taylor | Short answer: We don't. We could get by with just $\sin$, $\cos$, maybe $\tan$. The other names are just there by tradition. | |
| Mar 29, 2018 at 21:58 | comment | added | Xii | @AsafKaragila Additionally, what on earth is your hot network qs thing? | |
| S Mar 29, 2018 at 21:56 | history | suggested | Nij | CC BY-SA 3.0 |
Sp/Gr/Synt. Formatting. Readability. Title. Removed irrelevant meta commentary.
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| Mar 29, 2018 at 21:50 | comment | added | Xii | @AsafKaragila how is that a click bait title? | |
| Mar 29, 2018 at 21:43 | review | Suggested edits | |||
| S Mar 29, 2018 at 21:56 | |||||
| Mar 29, 2018 at 20:59 | comment | added | Asaf Karagila♦ | Yes, it's great to be on the hot network questions list. Can we have a non clickbait title please? | |
| Mar 29, 2018 at 19:14 | answer | added | David Richerby | timeline score: 32 | |
| Mar 29, 2018 at 18:09 | history | edited | Xii | CC BY-SA 3.0 |
added 106 characters in body; edited title
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| Mar 29, 2018 at 18:07 | history | reopened |
MJD Alexander Gruber♦ |
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| Mar 29, 2018 at 18:06 | comment | added | Xii | @PrzemysławScherwentke How polite(!) | |
| Mar 29, 2018 at 17:31 | comment | added | Przemysław Scherwentke | @OttavioBartenor Certainly! OP's question is so strange, that it needs strange examples. | |
| Mar 29, 2018 at 17:12 | review | Reopen votes | |||
| Mar 29, 2018 at 17:17 | |||||
| Mar 29, 2018 at 17:09 | comment | added | Peter | I just noticed the score of the linked question ... | |
| Mar 29, 2018 at 17:06 | comment | added | Peter | This title is worse. Now we could argue that we do not need $\cos(x)$ because it is $\frac{1}{\sec(x)}$ | |
| Mar 29, 2018 at 17:02 | comment | added | anon | OP: You wrote the title "why do we need definitions?" and that is the title that caused backlash. | |
| Mar 29, 2018 at 16:56 | history | edited | Xii | CC BY-SA 3.0 |
added 15 characters in body; edited title
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| Mar 29, 2018 at 16:55 | history | closed |
Angina Seng Matthew Towers xxxxxxxxx Sri-Amirthan Theivendran CommunityBot |
Needs details or clarity | |
| Mar 29, 2018 at 16:55 | comment | added | user296602 | Your title should explicitly describe the content of the question. "Why do we need definitions?" is a bad title since it a) doesn't describe what you're actually asking and b) is actively misleading about what the content is. Voting to close as unclear now. | |
| Mar 29, 2018 at 16:55 | history | edited | Xii | CC BY-SA 3.0 |
added 104 characters in body
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| Mar 29, 2018 at 16:53 | history | rollback | Xii |
Rollback to Revision 4
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| Mar 29, 2018 at 16:53 | history | edited | user296602 | CC BY-SA 3.0 |
Made title explicitly describe question content
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| Mar 29, 2018 at 16:51 | history | edited | Xii | CC BY-SA 3.0 |
added 165 characters in body; edited title
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| Mar 29, 2018 at 16:44 | answer | added | J.G. | timeline score: 10 | |
| Mar 29, 2018 at 16:44 | comment | added | anon | Indeed, someone did ask why we need both sine and cosine, to the tune of a 116 question score, 16k views, and being the #3 question in the (trigonometry) tag. | |
| Mar 29, 2018 at 16:43 | answer | added | Xander Henderson♦ | timeline score: 75 | |
| Mar 29, 2018 at 16:42 | review | Close votes | |||
| Mar 29, 2018 at 16:56 | |||||
| Mar 29, 2018 at 16:39 | history | edited | Asaf Karagila♦ | CC BY-SA 3.0 |
edited title
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| Mar 29, 2018 at 16:36 | answer | added | Joonas Ilmavirta | timeline score: 5 | |
| Mar 29, 2018 at 16:36 | answer | added | The Integrator | timeline score: 21 | |
| Mar 29, 2018 at 16:33 | history | edited | anon | CC BY-SA 3.0 |
edited tags; edited title
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| Mar 29, 2018 at 16:32 | comment | added | Ottavio | Let's take it further, @PrzemysławScherwentke: why do you need $cos(x)$? It is $sin(x+\frac{\pi}{2})$ | |
| Mar 29, 2018 at 16:31 | comment | added | Théophile | There's a huge difference between your title and the body of the question: "Why do we need definitions?" is a broad ontological or semantic question, while "Why do we need the function $\sec x$?" is something else entirely. | |
| Mar 29, 2018 at 16:31 | comment | added | Sri-Amirthan Theivendran | Why not express everything in terms of $\exp(ix)$ | |
| Mar 29, 2018 at 16:30 | comment | added | anon | While the title is misleading, the question is valid: we (at least seem) to have an unnecessary surplus of trigonometric functions. We could get away with just $\sin$ and $\cos$ for most purposes if we wanted. Which begs the question why they were chosen to be named. This question definitely ran through my mind when first learning trigonometry. I disagree with the downvotes, close votes, and find the top three comments here to be unhelpful. | |
| Mar 29, 2018 at 16:28 | comment | added | MJD | I'm not sure, but I think these are left over from an earlier time when trigonometry was practiced more geometrically and with less of an algebraic emphasis. The name of the "secant" is another vestige of this time: a "secant" is a line that cuts a curve at two points. What line does the "secant" function refer to? ( I don't know.) | |
| Mar 29, 2018 at 16:26 | answer | added | user | timeline score: 5 | |
| Mar 29, 2018 at 16:26 | comment | added | Przemysław Scherwentke | Why do you need $\tan(x)$? It is $\sin(x)/\cos(x)$. | |
| Mar 29, 2018 at 16:25 | comment | added | Randall | Because things have to mean something. | |
| Mar 29, 2018 at 16:24 | comment | added | vadim123 | What is "their normal form", but another definition? | |
| Mar 29, 2018 at 16:24 | history | asked | Xii | CC BY-SA 3.0 |