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Mathematics Senior High

(ⅲ)の解説の前半の下から2行目「ただ一つだけ存在する」の意味がよく分からないのでどういうことか説明して頂きたいです💦

21 辺の長さの変化と三角比 (1) BC=2√/3 のとき、 △ABCにおいて, 余弦定理により (2√3)=AB2+4²-2・AB・4cos60° AB-4AB+4=0 (AB-2)² = 0 よって AB = '2 この AB+BC" = ACA が成り立つから、△ABCは∠B=90°の直角三角形 (①) である。1 (ii) BC=4 のとき, AC=BC=4 であるから △ABCは∠Cを頂角 とする二等辺三角形である。 よって, 底角は等しく∠A=∠B=60° である。このとき, ∠C=180° ∠A-∠B=60° である。 △ABC はすべての内角が 60° であるから, AB=BC=CA=4 の正三角 形 (⑩) である。 ( BC=2√3 のときと, BC4 のときを図示すると図1のように なる。 BCの長さをaとする。 2√3より大きく4より小さい値を考え, 点Cを中心として半径aの円をかくと, 図2のように直線ℓと2点 で交わり、このとき, 合同でない △ABCが2つ存在する (△AB,C, △ABC)。 0<a<2√3 となる △ABC は存在せず,a>4となる△ABCは ただ1つだけ存在するから,2√3 <a < 4 を満たす値を考え, BC=√15 (②) が適当である。 図1 60° 2√3 x sin ∠B よって ∠ABC=180°∠ABC したがって AC BC sin ZB sin ZA 4 B A B B2 図2において, △CB1 B2 は CB1 = CB2 の二等辺三角形であるから ∠CB1 B2=∠CB2 B1 (2) △ABCにおいて, 正弦定理により 7 sin 40° よって sin <B= B sin∠ABC = sin (180°∠AB2C) = sin ∠AB2C (①) cos∠ABC=cos (180° AB2C) =-cos∠AB2C (③) Point 図2 sin 40° 7 x C 2√3 37 ←B C A 2²+2√3)=4' である。 AB: AC:BC=1:2:√3 である ことからも, 直角三角形である ことがわかる。 ingr B (C 図形と計量 sin (180°-0) = sin0 cos (180°-0) = -cos (

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English Senior High

間違ってるとこあったら教えてください

英語 6 次のグラフ及び英文を読み、1から3の質問の答えとして最も適当なものを,それぞれ①~④ 23 のうちから一つずつ選びなさい。 解答番号は Not very familiar 18% Somewhat familiar 25% Not familiar 7% 21 Survey on Esports - 7 - Very familiar 50% Kazuhiro's dream is to be a professional esports player in the future. Esports stands for electronic sports. It is a form of video game competition. Sometimes tournaments for money are held and many people watch them online. Kazuhiro's friends introduced him to esports a few years ago, and he quickly became one of the best players among his friends. He has also participated in many local esports tournaments with them, and their team always won first or second place. Because of this experience, he started thinking of becoming a professional esports player. In one of his classes, Kazuhiro had to make a newsletter for his assignment. He decided to do a survey on esports. He found that some of his classmates were not familiar with esports. So, he thought he would try promoting it in his high school. He held an esports event for his classmates at school. He was not sure whether anyone would come to this event, but to his surprise, many students attended and enjoyed his workshop. He showed them some of the most famous video games in esports. He also gave them some advice on how to win. Finally, he did a live esports demonstration and played against a friend in another country. After this, a lot of his classmates asked Kazuhiro about esports. He felt pleased and satisfied with what he did. Now, he not only wants to be a professional esports player, but also be a person who can promote it. Through esports, he has been able to make friends all over the world, and he wants to spread the joy to other people. 2023KN1A-14-008 1 According to the pie chart, which of the following is true? 0 Less than 50% of the students are familiar with esports. 2 More than 90% of the students are not familiar with esports. 3 Twenty-five percent of the students are not familiar at all with esports. 4 Seventy-five percent of the students are familiar with esports. 2 According to the passage, which of the following is true about Kazuhiro? He wants to be a professional esports player. He wants to create a new video game in esports. He has a negative image of esports. 4 He has already won a lot of money from playing esports. 2 3 3 According to the passage, which of the following is true about Kazuhiro? He got confused when his friends asked him questions about esports. 2 He held an event to teach his classmates about esports at his school. 3 He was disappointed because not many people came to his workshop. 4 He learned about a professional esports player from his classmates. - 8 21 英語 22 23 2023KN1A-14-00

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English Senior High

赤線の部分、日本語の解釈に言及していますが、どちらも同じ意味なのでは?と思ってしまいます。

SVO+分詞 TARGET → 160 (1) He kept me waiting for forty minutes. (2) We usually keep the window locked. (1) 彼は私を40分間待たせた。 (2) 私たちは、 いつもその窓のカギはかけておく。 目的語の後に分詞 目的語の状態を表 す OisC 〈SVO+分詞〉 の 表現 keep は SVOCの文型 (p.51) で用いられ, 「O を C の状態にしておく」という意味を表すことができる。 (1) で は waiting (2) ではlockedが補語となっていて, (1) は 「私を待たせておいた」 (2) は 「窓のカギをかけておく」と いう意味になる。 SVOCの場合は、OとCのあいだに 「○は~だ」 という O is Cの関係が成り立つ。 したがって, (1) は I was waiting., (2) は The window is locked. という文を作 ることができる。現在分詞の waiting は能動の意味を, 過 去分詞のlockedは受動の意味 ( 「カギがかけられている」) を表していることを確認しよう。 <SVO+分詞>の表現には次のようなものもある。 I found my brother using my game machine. (弟がぼくのゲーム機を使っているのを見つけた。) この場合, my brotherとusing my game machine のあいだに SVO という関係があるので, 「ぼくのゲーム機 Umarted WAII を使っている弟を見つけた」 と解釈するのは誤り。 I want this room cleaned up by tomorrow. (この部屋を明日までに片づけてほしい。 Check()内の動詞を適切な分詞の形に変えなさい。 71 VEREA 1) When I came home, I found my wife (sleep) on the sofa. We 2) Don't leave the door (unlock). 3) I want this problem (solve) by tomorrow. 01 分詞

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English Senior High

答え合わせをしたいので「アップリフト英文法 文法項目別演習1000」の受動態の解答をお願いしたいです😭

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