8 May 2025

• curprev 04:2504:25, 8 May 2025 Sevenoptimus talk contribs 2,812 bytes +231 Added a brief explanation of how to compute tan(15)
• curprev 04:2204:22, 8 May 2025 Sevenoptimus talk contribs 2,581 bytes −2,050 Removed erroneous alternative 'solution'

25 March 2025

• curprev 19:5019:50, 25 March 2025 Unhappyfarmer talk contribs 4,631 bytes +147 →Solution

24 May 2024

• curprev 16:4616:46, 24 May 2024 Disphenoid lover talk contribs 4,484 bytes −1,538 →Solution
• curprev 16:4316:43, 24 May 2024 Disphenoid lover talk contribs 6,022 bytes +1,538 →See also

28 December 2022

• curprev 18:3318:33, 28 December 2022 El008 talk contribs 4,484 bytes +84 →Solution

6 December 2019

• curprev 03:4303:43, 6 December 2019 P groudon talk contribs 4,400 bytes +203 No edit summary

7 November 2019

• curprev 22:2722:27, 7 November 2019 Aops turtle talk contribs m 4,197 bytes −5 →Solution
• curprev 22:2722:27, 7 November 2019 Aops turtle talk contribs m 4,202 bytes +13 →Solution

9 July 2019

• curprev 12:1912:19, 9 July 2019 Justkeeprunning talk contribs 4,189 bytes +2 →Solution

10 March 2019

• curprev 14:4714:47, 10 March 2019 Bobcats talk contribs m 4,187 bytes +91 →Problem

19 February 2019

• curprev 20:0520:05, 19 February 2019 P groudon talk contribs 4,096 bytes −296 No edit summary

27 May 2018

• curprev 22:3922:39, 27 May 2018 Chickenry talk contribs m 4,392 bytes +6 →Solution
• curprev 22:3922:39, 27 May 2018 Chickenry talk contribs 4,386 bytes +255 →Solution

9 May 2017

• curprev 02:4902:49, 9 May 2017 Ktthree talk contribs 4,131 bytes +318 →Problem

21 January 2017

• curprev 10:1110:11, 21 January 2017 NormanWho talk contribs 3,813 bytes +153 →Problem

4 July 2013

• curprev 18:2218:22, 4 July 2013 Nathan wailes talk contribs 3,660 bytes +15 No edit summary

3 November 2011

• curprev 01:4001:40, 3 November 2011 Aopsvd talk contribs 3,645 bytes −95 →Solution
• curprev 01:4001:40, 3 November 2011 Aopsvd talk contribs 3,740 bytes +6 →Problem

11 April 2008

• curprev 21:0721:07, 11 April 2008 Azjps talk contribs m 3,734 bytes +78 →Solution: minor tex
• curprev 21:0621:06, 11 April 2008 Azjps talk contribs 3,656 bytes +1,360 solution by calc rulz, misleading diagram
• curprev 20:3220:32, 11 April 2008 Azjps talk contribs m 2,296 bytes +87 minor

22 April 2007

• curprev 19:2619:26, 22 April 2007 Gabiloncho talk contribs 2,209 bytes −11 →Solution
• curprev 19:0919:09, 22 April 2007 Gabiloncho talk contribs 2,220 bytes +1,524 →Solution

2 March 2007

• curprev 01:3601:36, 2 March 2007 Minsoens talk contribs m 696 bytes +626 No edit summary

9 July 2006

• curprev 17:2117:21, 9 July 2006 Joml88 talk contribs 70 bytes +70 No edit summary