"울프람알파의 활용"의 두 판 사이의 차이
Pythagoras0 (토론 | 기여) 잔글 (찾아 바꾸기 – “<h5>” 문자열을 “==” 문자열로) |
Pythagoras0 (토론 | 기여) 잔글 (찾아 바꾸기 – “</h5>” 문자열을 “==” 문자열로) |
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1번째 줄: | 1번째 줄: | ||
− | <h5 style="line-height: 3.428em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">이 항목의 스프링노트 원문주소 | + | <h5 style="line-height: 3.428em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">이 항목의 스프링노트 원문주소== |
* [[울프람알파의 활용]] | * [[울프람알파의 활용]] | ||
7번째 줄: | 7번째 줄: | ||
− | ==개요 | + | ==개요== |
* 울프람 알파 | * 울프람 알파 | ||
16번째 줄: | 16번째 줄: | ||
− | ==문제풀이와 울프람알파 | + | ==문제풀이와 울프람알파== |
* [http://blog.wolframalpha.com/2009/12/01/step-by-step-math/ Step-by-Step Math] | * [http://blog.wolframalpha.com/2009/12/01/step-by-step-math/ Step-by-Step Math] | ||
25번째 줄: | 25번째 줄: | ||
− | ==방정식의 풀이 | + | ==방정식의 풀이== |
* [http://blog.wolframalpha.com/2010/01/14/solving-equations-with-wolframalpha/ Solving Equations with Wolfram|Alpha] | * [http://blog.wolframalpha.com/2010/01/14/solving-equations-with-wolframalpha/ Solving Equations with Wolfram|Alpha] | ||
33번째 줄: | 33번째 줄: | ||
− | ==숙제와 울프람알파 | + | ==숙제와 울프람알파== |
* http://blog.wolframalpha.com/2010/01/22/is-it-cheating-to-use-wolframalpha-for-math-homework/ | * http://blog.wolframalpha.com/2010/01/22/is-it-cheating-to-use-wolframalpha-for-math-homework/ | ||
41번째 줄: | 41번째 줄: | ||
− | ==그래프 그리기 | + | ==그래프 그리기== |
91번째 줄: | 91번째 줄: | ||
− | <h5 style="margin: 0px; line-height: 3.428em; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">사용예 | + | <h5 style="margin: 0px; line-height: 3.428em; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">사용예== |
* [http://www.wolframalpha.com/input/?i=r%5E2 http://www.wolframalpha.com/input/?i=r^2]<br> | * [http://www.wolframalpha.com/input/?i=r%5E2 http://www.wolframalpha.com/input/?i=r^2]<br> | ||
100번째 줄: | 100번째 줄: | ||
− | ==관련된 항목들 | + | ==관련된 항목들== |
* [[프랙탈]] | * [[프랙탈]] |
2012년 11월 1일 (목) 13:57 판
이 항목의 스프링노트 원문주소==
개요
- 울프람 알파
- 연산능력을 갖춘 지식엔진
- http://www.wolframalpha.com
- http://mathdl.maa.org/images/upload_library/23/karaali/alpha/index.html
문제풀이와 울프람알파
방정식의 풀이
숙제와 울프람알파
그래프 그리기
10.4.44.
http://www.wolframalpha.com/input/?i=(r-(8%2B8sin+theta))(r+sin+theta+-4)%3D0
[/pages/4176465/attachments/2110589 1MSP761197847h1hg25e7he00004g3ehh9ag590ea81.gif]
Note that \(2\sin^2 \alpha +2\sin \alpha-1=0\).
Since \(0< \alpha <\frac{\pi}{2}\), \(\sin \alpha =\frac{\sqrt 3 -1}{2}\) and \(\cos \alpha =\sqrt{\frac{\sqrt 3}{2}}\)
\(\frac{1}{2}\int_{\alpha}^{\pi-\alpha}r^2 d\theta=\int_{\alpha}^{\pi/2}r^2 d\theta=\int_{\alpha}^{\pi/2}64(1+\sin\theta)^2d\theta\)
\(=64\int_{\alpha}^{\pi/2}(1+\sin\theta)^2d\theta=64\int_{\alpha}^{\pi/2}1+2\sin\theta+\sin^2\theta d\theta\)
\(=64[\frac{3}{2}\theta - 2 \cos \theta- \frac{1}{4}\sin 2\theta]_{\alpha}^{\pi/2}=[96\theta - 128 \cos \theta- 16\sin 2\theta]_{\alpha}^{\pi/2}\)
\(=[96\theta - 128 \cos \theta- 16\sin 2\theta]_{\alpha}^{\pi/2}=48\pi-96\alpha+128\cos \alpha+16\sin 2\alpha\)
We need to subtract from this the area of the triangle which is given by \[2\times \frac{1}{2}\cdot 4 (8+8\sin\alpha)\sin (\pi/2-\alpha)=32(1+\sin\alpha)\cos \alpha=32\cos \alpha+16 \sin 2\alpha\]
So the area will be given by \[48\pi-96\alpha+128\cos \alpha+16\sin 2\alpha-(32\cos \alpha+16 \sin 2\alpha)=48\pi-96\alpha+96\cos \alpha\approx 204.16\]
http://www.wolframalpha.com/input/?i=N[48pi+-96(arcsin{(sqrt+3+-+1)/2})%2B96(sqrt((sqrt+3)/2)),10]
사용예==
- http://www.wolframalpha.com/input/?i=r^2
- http://www.wolframalpha.com/input/?i=
- http://www.wolframalpha.com/input/?i=
- http://www.wolframalpha.com/input/?i=
관련된 항목들
- http://www.wolframalpha.com/input/?i=r^2
- http://www.wolframalpha.com/input/?i=
- http://www.wolframalpha.com/input/?i=
- http://www.wolframalpha.com/input/?i=