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数学 高校生

ピンクのところどうしたらこのように展開できるんですか?

例題 344 内積と三角形の面積 点Oを原点とする.a=OA = (a1,a2), = OB = (b1,62), AOAB の面 積をSとする.このとき,次の式を示せ . せ s={√|ª³|b³²—(à• b)² = |a1b₁-a2b₁| BA A 考え方とのなす角を0とすると、△OAB の面積Sは, ■解答 S=OA-OB sine= |a|6|sine 5+36 9= 2 である. sin'0+cos0=1, d・L = |a||| cose を利用する aとのなす角を90°<9<180°) とすると, sin00 より, sin0=√1-cos' であるから, S=1/120A・OBsin=1/21|2|3|sine Focus -CO よって, ①, ②より, 与式は成り立つ. = |al|6|√1-cos²0=√|a³|b³(1-cos³0) - 100 = 1/2 √la 196³-|à P²|6|³ªcos²0 =√√ã³²|6³²-(¦â||b|cos0)² -√ã²b³²—(ã·¯)² また, lap=a²+a2²,16=622+62², at=ab+azb2 ①を成分で表す. であるから,①に代入して S=½ √(ai²+a2²)(b₁²+b₂²)— (a₁b₁+a2b2)² =1/12 -√(a₁b₂)²—2a₁b₁a₂b₂+(a₂b₁)² 1021 = 0 AO 8=58 ==√(a₁b₂-a₁b₁)² = |a₁b₁-a₂bil.... =3rd=d-0 0=A5+50+87 0=5+3+ HA 0 sin20+cos20=1 どのよ sin'0=1-cos20 sin0 >0 より sin0=√1-cos20 B △OAB で, OA= (a1,a2), OB=(b1,62) のとき, s=-=|a₁b₂-a₂b₁| lab2- 注 △ABCの面積も, a = AB, AC とおいて同様に求められる。 MASCH ATEA B O OH HA の結果を利用して、次の三角形の面積を求めよ. CADの面積 S b OS -MA) 38 (15-30-38-A ** a √A2=|A| S=absine 第9章

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数学 高校生

どなたか答え合わせお願いします🙇‍♀️🙏💦

Ⅰ. 次の太字の英単語に最も近い意味を持つものを,a~d. の中から1つ選びなさい。 解答 は解答用紙1枚目 (マークシート方式) の所定の解答欄にマークしなさい。 (1) opportunity a. charge b. choice chance d. check (3) criterion a standard b. criticism c. agreement d. sequence (5) compensation a. money given or received as payment for a loss b. mathematical statement showing equal parts c. event where people celebrate d. advantage given to only certain people (7) registration a act of recording information b. idea that leads to further discussion c. strong like or appreciation for another d. one part of a larger component (9) distribute a. derive from an original source b. make available to see c. hand out or deliver something d. be different from others (2) reject a. make illegal refuse to accept c. express support d. give an order (4) application formal request a 6. changed behavior official record d. expression of ideas (6) intervention a. event which results in the police arriving b. having the freedom to make decisions c. distance from front to back d. act of coming between groups in a dispute (8) density a. affection for someone or something X. need for food C degree to which an area is filled or covered d. state of ownership (10) circumstance a. outcome of an event b. addition that makes something better c. feeling or action in response to something d. condition or fact that affects a situation

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英語 中学生

中2英語読解力問題です。 (2)のtellの解き方と、(3)の文章の語順のしくみについて教えていただきたいです🙇🏻‍♀️💦 よろしくお願いします💦

4. コンビニで、たまたま英字新聞が目についたので、友達といっしょに買ってみた。 Thursday, December 12, 2019 EIGO LAB TIMES それ (この壁画) は創作的な物語の痕跡を表している The World's Oldest "Story" Was Found in Indonesia 物語を伝えること (口承文学 ) In 2017,/a *cave painting was found/in *Indonesia.// こんせき ate : mystery : 謎 注 cave: 洞窟 Indonesia : インドネシア record: 記録 sign: 痕跡 create: 創り出す intelligent 知性のある unknown: 解明されていない figure out : 解明する (2) 記事の The research team says/that it is the earliest known *record of “storytelling." vligh y 知られている最古の記録 Cave paintings are find/in many parts of the world,/ and many of them tell us/about ancient human life.// But this painting is different/ it shows *signs of creative stories.//Surprisingly,/ancient humans enjoyed *creating and tell stories/almost 44,000 years ago.// This *implies/they were highly *intelligent./ Much about ancient times is still *unknown./The team's effort/to *figure out the *mysteries of the cave この洞窟の壁画の謎を painting/continue.// [99 words ] 解明するための研究チームの努力 要点をつかむ (1) この壁画は,どんなことが他の壁画とちがっていると書かれていますか。 ア インドネシアで発見されたこと 古代の人々の生活が描かれていること ウ物語が描かれていること 詳細をおさえる Edition 055 の語をそれぞれ適する形に変えなさい。 found te telling continue → find When and where was this cave painting found? (7) It was found in 2017 in Indonesia. imply: 意味する brid ledW ウ continues.

解決済み 回答数: 1
英語 中学生

(2)のcontinueの問題が分かりません… 教えていただきたいです🙇🏻‍♀️💦

Thursday, December 12, 2019 汗 cave: The World's Oldest "Story" Was Found in Indonesia In 2017, a *cave painting was found in *Indonesia. The research team says that it is the earliest known *record of "storytelling." doprio of s Cave paintings are find in many parts of the world, and many of them tell us about ancient human life. But this painting is different it shows *signs of creative stories. Surprisingly, ancient humans enjoyed *creating and tell stories almost 44,000 years ago. This implies they were highly *intelligent. Much about ancient times is still *unknown. The team's effort to *figure out the *mysteries of the cave painting continue. [99 words ] どうくつ Indonesia : インドネシア unknown intelligent 知性のある (2) 記事の find- EIGO LAB TIMES record : 2 こんせき sign: create: 創り出す figure out 解明する mystery: 要点をつかむ (1) この壁画は、どんなことが他の壁画とちがっていると書かれていますか。 ア インドネシアで発見されたこと イ 古代の人々の生活が描かれていること ウ物語が描かれていること 詳細をおさえる の語をそれぞれ適する形に変えなさい。 found tell- telled felling 1 continue - que Dail in this cave painting found? (7) Edition 055 imply 意味する continueing continues

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英語 高校生

なぜdに入るのが③なんですか?④ではないのですか?

Who was the first scientist? It wasn't Isaac Newton. Today, it is generally acknowledged that Newton never thought of himself as a scientist. He couldn't, for the word didn't exist in was not only a scientist, but the greatest scientist who ever lived, yet (Newton his time. Newton thought of himself as a "philosopher," a word that (a)dates back to the ancient Greek thinkers and that comes from Greek words (b)meaning "lover of wisdom." There are different kinds of wisdom we might love, of course. Some philosophers are concerned chiefly with the wisdom derived from the study of the world about us and the manner of its workings. The world { c ℗ about 2 be 3 can 4 referred 5 to 6 us as "nature," from the Latin word meaning “birth." Nature, in other words, is everything that has been created or that has come into being. Philosophers who deal primarily with nature are, therefore, "natural philosophers." Newton thought of himself as a natural philosopher, and the sort of thing he studied was natural philosophy. Thus, when he wrote the book (d) he carefully described his three laws of motion and his theory of universal gravitation—the greatest scientific book ever written-he called it (in Latin) Philosophiae Naturalis Principia Mathematica, which in English is The Mathematical Principles of Natural Philosophy. The Greek word for "natural" is physikos, which in English becomes physical. Natural philosophy might also be spoken of as "physical philosophy, which can be shortened to “physics.” on. Physics As natural philosophy grew and expanded, all kinds of special studies developed. People began to speak of chemistry, of geology, of physiology, and so was whatever was left over, so it didn't suit as a general overall word for natural philosophy. Yet you needed some such short word, for natural philosophy was a seven-syllable mouthful.

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