Law of tangents: Revision history

2 May 2024

• curprev 21:4921:49, 2 May 2024‎ Smichr talk contribs‎ 6,986 bytes −1,588‎ Remove the discussion of the alternate form of the tangent law. undo
• curprev 06:1406:14, 2 May 2024‎ Smichr talk contribs‎ 8,574 bytes +1,656‎ The shorter form with derivation is introduced before application and external link to derivation is removed. Both forms are discussed in the application section which has been modified to make clear that one solves for the difference and then uses that to calculate alpha and beta. undo

1 May 2024

• curprev 15:3615:36, 1 May 2024‎ Symmetry matters talk contribs‎ 6,918 bytes +83‎ No edit summary undo
• curprev 15:2815:28, 1 May 2024‎ Symmetry matters talk contribs‎ 6,835 bytes +23‎ No edit summary undo
• curprev 15:2415:24, 1 May 2024‎ Symmetry matters talk contribs‎ 6,812 bytes +740‎ A generalization of the law of tangents for cyclic quadrilaterals has been added. undo

29 April 2024

• curprev 00:0100:01, 29 April 2024‎ Jacobolus talk contribs‎ 6,072 bytes −381‎ Undid revision 1221270069 by Smichr (talk) – stack exchange is not a reliable source, and this other identity does not belong in the lead section of this article undo Tag: Undo

28 April 2024

• curprev 22:2822:28, 28 April 2024‎ Smichr talk contribs‎ 6,453 bytes +381‎ No edit summary undo Tag: Reverted

26 April 2023

• curprev 14:4114:41, 26 April 2023‎ Hu741f4 talk contribs‎ m 6,072 bytes +22‎ Also called tangent rule undo Tags: Visual edit Mobile edit Mobile web edit

9 September 2022

• curprev 04:4504:45, 9 September 2022‎ Jacobolus talk contribs‎ m 6,050 bytes +2‎ →‎History undo
• curprev 04:4504:45, 9 September 2022‎ Jacobolus talk contribs‎ 6,048 bytes +152‎ →‎History: Debarnot also describes the use of the planar law of tangents by Ibn Muʿādh al-Jayyānī (p. 184) undo

21 April 2022

• curprev 17:4417:44, 21 April 2022‎ David Eppstein talk contribs‎ m 5,896 bytes −23‎ Reverted edits by Northamerica1000 (talk) to last version by Taylor Riastradh Campbell undo Tag: Rollback
• curprev 16:5016:50, 21 April 2022‎ Northamerica1000 talk contribs‎ 5,919 bytes +23‎ →‎See also: {{portal|Mathematics}} undo Tag: Reverted

19 November 2021

• curprev 20:5020:50, 19 November 2021‎ Taylor Riastradh Campbell talk contribs‎ 5,896 bytes −28‎ →‎Application: Link catastrophic cancellation directly and reword slightly. undo

29 September 2021

• curprev 10:3610:36, 29 September 2021‎ Citation bot talk contribs‎ 5,924 bytes +16‎ Add: chapter-url. Removed or converted URL. | Use this bot. Report bugs. | Suggested by Abductive | Category:Trigonometry | #UCB_Category 56/105 undo

12 June 2021

• curprev 11:2811:28, 12 June 2021‎ Jacobolus talk contribs‎ m 5,908 bytes −4‎ No edit summary undo
• curprev 11:2311:23, 12 June 2021‎ Jacobolus talk contribs‎ 5,912 bytes −183‎ consistently skip parens for half-angle trig functions, to reduce clutter undo

5 January 2021

• curprev 03:4703:47, 5 January 2021‎ 73.162.12.188 talk‎ 6,095 bytes −23‎ →‎Proof undo

2 November 2020

• curprev 18:3118:31, 2 November 2020‎ Tarnoob talk contribs‎ 6,118 bytes −2‎ →‎Notes: cat. undo

17 May 2020

• curprev 21:4721:47, 17 May 2020‎ ArnoldReinhold talk contribs‎ 6,120 bytes +105‎ Adding local short description: "Relates tangents of two angles of a triangle and the lengths of the opposing sides", overriding Wikidata description "theorem" (Shortdesc helper) undo

6 February 2020

• curprev 14:1414:14, 6 February 2020‎ Thanoscar21 talk contribs‎ m 6,015 bytes +1‎ Changed we to one undo

11 October 2019

• curprev 18:3518:35, 11 October 2019‎ Wcherowi talk contribs‎ 6,014 bytes −17‎ Reverted 3 edits by 2A00:23C5:DF86:4400:7CC1:473E:33D8:998D (talk): Rm vandalism (TW) undo Tag: Undo
• curprev 18:1218:12, 11 October 2019‎ 2a00:23c5:df86:4400:7cc1:473e:33d8:998d talk‎ 6,031 bytes −7‎ →‎Notes undo Tags: Mobile edit Mobile web edit
• curprev 18:1018:10, 11 October 2019‎ 2a00:23c5:df86:4400:7cc1:473e:33d8:998d talk‎ 6,038 bytes +17‎ No edit summary undo Tags: Mobile edit Mobile web edit
• curprev 18:0918:09, 11 October 2019‎ 2a00:23c5:df86:4400:7cc1:473e:33d8:998d talk‎ 6,021 bytes +7‎ →‎Notes undo Tags: Mobile edit Mobile web edit

16 September 2019

• curprev 20:3820:38, 16 September 2019‎ 24.229.42.19 talk‎ 6,014 bytes −2‎ Undid revision 916068985 by 24.229.42.19 (talk) undo Tag: Undo
• curprev 20:3520:35, 16 September 2019‎ 24.229.42.19 talk‎ 6,016 bytes +2‎ Law of Sines and Law of Tangents don't work when one knows two sides and an included angle, as at least one opposite pair is necessary. I am assuming the original statement was intended to read NON-included angle, and have adjusted accordingly. I did not add a note about the possibility of an ambiguous triangle, but it might be worth having. undo

24 April 2019

• curprev 18:1018:10, 24 April 2019‎ Bensjones talk contribs‎ m 6,014 bytes −38‎ removed an internal link that led to the same section. undo Tag: Visual edit

22 March 2019

• curprev 21:3221:32, 22 March 2019‎ Certes talk contribs‎ 6,052 bytes −2‎ Undid revision 889015586 by 212.67.86.145 (talk): this still needs + even for a difference of angles undo Tag: Undo
• curprev 21:1621:16, 22 March 2019‎ 212.67.86.145 talk‎ 6,054 bytes +2‎ →‎Proof undo

23 February 2019

• curprev 19:4319:43, 23 February 2019‎ Utcursch talk contribs‎ m 6,052 bytes −6‎ →‎History: spell / clean-up, replaced: |publisher=Motilal Banarsidass Publ. → |publisher=Motilal Banarsidass undo Tag: AWB

21 February 2019

• curprev 19:1419:14, 21 February 2019‎ Michael Hardy talk contribs‎ 6,058 bytes −1,002‎ This added section says nothing about the law of tangents as it is stated at the beginning of this article, but only gives some basic definitions suitable for our article on trigonometric functions, and those definitions are already in that article. undo
• curprev 11:5511:55, 21 February 2019‎ 112.79.208.122 talk‎ 7,060 bytes +1,002‎ No edit summary undo Tags: Mobile edit Mobile web edit
• curprev 11:4611:46, 21 February 2019‎ Michael Hardy talk contribs‎ 6,058 bytes −1,085‎ This new section has no value in this context. There are blatant mismatches between the illustration and the text: The illustration has no angle labeled theta and the text refers to it; The illustration has nothing near a right angle at C, whereas the text says it does; and the added text below that is only basic definitions in trigonometry and says nothing about the law of tangents. undo
• curprev 11:4011:40, 21 February 2019‎ 2402:3a80:119a:fae7::5aa5:dd21 talk‎ 7,143 bytes +89‎ →‎Application on right triangles undo Tags: Mobile edit Mobile web edit
• curprev 11:3711:37, 21 February 2019‎ 2402:3a80:119a:fae7::5aa5:dd21 talk‎ 7,054 bytes +996‎ No edit summary undo Tags: Mobile edit Mobile web edit
• curprev 10:5610:56, 21 February 2019‎ Michael Hardy talk contribs‎ 6,058 bytes −1,507‎ This new section does not appear to add anything, and the text within it does not come anywhere near matching the illustration. undo
• curprev 10:5210:52, 21 February 2019‎ Michael Hardy talk contribs‎ 7,565 bytes +2‎ No edit summary undo
• curprev 10:4910:49, 21 February 2019‎ 2402:3a80:119a:fae7::5aa5:dd21 talk‎ 7,563 bytes +1,506‎ No edit summary undo Tags: nowiki added Visual edit Mobile edit Mobile web edit
• curprev 10:3010:30, 21 February 2019‎ 2402:3a80:119a:fae7::5aa5:dd21 talk‎ 6,057 bytes −1,019‎ No edit summary undo Tags: section blanking Visual edit Mobile edit Mobile web edit

20 November 2017

• curprev 20:0920:09, 20 November 2017‎ 86.130.176.74 talk‎ 7,076 bytes +26‎ No edit summary undo

14 November 2017

• curprev 12:2412:24, 14 November 2017‎ Dewritech talk contribs‎ 7,050 bytes +1‎ clean up, typo(s) fixed: Accordingly → Accordingly, using AWB undo

5 September 2017

• curprev 16:5516:55, 5 September 2017‎ WOSlinker talk contribs‎ m 7,049 bytes −1‎ fix image options undo

15 July 2017

• curprev 18:4118:41, 15 July 2017‎ Deacon Vorbis talk contribs‎ m 7,050 bytes −5‎ →‎Proof: LaTeX spacing clean up, replaced: \, </math> → </math> (2) using AWB undo

18 October 2016

• curprev 10:2910:29, 18 October 2016‎ Bender the Bot talk contribs‎ m 7,055 bytes +2‎ →‎History: http→https for Google Books and Google News using AWB undo

17 August 2016

• curprev 22:0422:04, 17 August 2016‎ Wcherowi talk contribs‎ 7,053 bytes +219‎ Reverted 1 edit by Arnon81 (talk): Wikipedia can not be used as a source; discuss this on the talk page. (TW) undo
• curprev 19:5919:59, 17 August 2016‎ Arnon81 talk contribs‎ 6,834 bytes −219‎ rebuild history section because surya siddhanta seems to be the inventor undo
• curprev 02:2602:26, 17 August 2016‎ Wcherowi talk contribs‎ 7,053 bytes −371‎ Undid revision 734805450 by Arnon81 (talk) can't use WP as a source undo

16 August 2016

• curprev 20:5120:51, 16 August 2016‎ Arnon81 talk contribs‎ 7,424 bytes +371‎ move history to section 'history', add reference undo
• curprev 20:1920:19, 16 August 2016‎ Arnon81 talk contribs‎ 7,053 bytes +13‎ add 'history' undo

25 June 2016

• curprev 21:1921:19, 25 June 2016‎ Odysseus1479 talk contribs‎ m 7,040 bytes −13‎ →‎Spherical version: ce undo