수학동아 - 폴리매스

함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] (번외편) 야우심통의 억지 논리 14

집돌이 페렐만 2019.10.27 06:53 조회 867

문제 푼 사람 2명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

이 에피소드는 그냥 오다가다 생각 난 이야기들 입니다. 정리가 조금 덜 되었고 딱히 창의적이지 않더라고 야우심통이 심심해서 한 말들이니 그냥 이해해 주세요.

페렐만 : 삼각함수 공부는 잘 되어가고 있냐? ㅋㅋ

야우심통 : 아...어려워...

페렐만 : 어디까지 배움?

야우심통 : 쓸데 없는 cos의 역사. "1620년 군터가 complementum sinus를 합친 co.sinus로 썼고 1658년에 뉴턴은 cosinus로 적었다. 1729년 오일러가 cos으로 적은 것이 오늘날까지 이어졌다." 이런거 배움... 난 뉴턴님이 오일러님 선배인줄 몰랐음(실제 폴리매스에서는 어떻게 되지? 뉴__턴님 & 21세기 오일러 님)

페렐만 :

그림과 같은 원에서 삼각함수를 아래와 같이 정의한다.

sinθ=yrsin⁡θ=yr

cosθ=xrcos⁡θ=xr

tanθ=yxtan⁡θ=yx

반지름이 1인 단위원이라면

sinθ=y,cosθ=x,tanθ=yx

이거 아냐?

야우심통 : 그거 맞음... 그런데 이해가 안 돼...

페렐만 : ㅋㅋ 야우심통 다음 편 나올라면 오래 걸리겠넹ㅋㅋ

야우심통 : 그동안 심심하실까봐 하나 준비함.

$x^{2} - xy + ax - ay = (x-y)(x-x) + (x-y)(a-a) = 0$

페렐만 : 할 일은 다 하네 ㅋㅋㅋ

이전글 하노이 탑 시리즈 2 완결

다음글 보물지도의 암호

이 문제 어떠셨나요?

글쎄요

어려워요

문제 찜하기 목록보기

댓글 작성하기

해결

도전

아인수타인 Lv.12 2019.10.27 10:01 비밀댓글

A PHP Error was encountered

Severity: Warning

Message: mkdir(): Permission denied

Filename: libraries/Common.php

Line Number: 202

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 202
Function: mkdir

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_put_contents(/DATA/upload/polymath/latex/2e30bd2b6ddbd1f06c6b92252a183e9f.gif): failed to open stream: No such file or directory

Filename: libraries/Common.php

Line Number: 213

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 213
Function: file_put_contents

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

비밀 댓글이 등록 되었습니다.

댓글 작성하기 댓글수0
21세기오일러 Lv.11 2019.10.27 19:58

저는 뉴턴님과 나이는 동갑, 폴리매스 활동기간은 제가 더 오래 된 걸로 알고 있어요.

( 저는 2018년 8월 1일에 첫문제를 냈습니다. )

댓글 작성하기 좋아요0 댓글수0
해결

도전

222 Lv.9 2019.10.28 07:34 비밀댓글

A PHP Error was encountered

Severity: Warning

Message: mkdir(): Permission denied

Filename: libraries/Common.php

Line Number: 202

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 202
Function: mkdir

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_put_contents(/DATA/upload/polymath/latex/198f34da24deac7ed0c4128644c5e62a.gif): failed to open stream: No such file or directory

Filename: libraries/Common.php

Line Number: 213

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 213
Function: file_put_contents

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: mkdir(): Permission denied

Filename: libraries/Common.php

Line Number: 202

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 202
Function: mkdir

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: file_put_contents(/DATA/upload/polymath/latex/1a129425d24b5818a1c95e00da94a825.gif): failed to open stream: No such file or directory

Filename: libraries/Common.php

Line Number: 213

Backtrace:

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 213
Function: file_put_contents

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 236
Function: getLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
Line: 90
Function: parseLatexImg

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
Line: 343
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 558
Function: view

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

비밀 댓글이 등록 되었습니다.

댓글 작성하기 댓글수0