青チャート147⑵が解説を読んでもよくわからなくて、自分で右のように解いてみたのですが、どこで間違っていますか？

直線y=mx+nとx軸の正の向きとのなす角をθとすると であるから,求める直線の傾きは 2直線のなす角まず, 各直線と 軸のなす角に注目 2直線V3x-2y+2=0, 3V3x+y-130 のなす鋭角0を求めよ。 147 2直線のなす角 本 例題 と茶の角をなす直線の傾きを求めよ。 直線y=2x-1 と Ap.227 基本事項2 y m=tan0 0S0<元, 0キ y=mx+n n n 2直線とx軸の正の向きとのなす角を α, Bとすると, 2直線 のなす鋭角0は, α<Bなら B-a または πー(B-e) の 40 m 0 一図から判断。 で表される。 この問題では, tana, tanβ の値から具体的な角が得られないので, tan(8-a)の計算に 加法定理 を利用する。 解答 0 2直線の方程式を変形すると 単に2直線のなす角を求める だけであれば,p.227 基本事 項2の公式利用が早い。 y=-3/3x+1 13 ーx+1, y=-3/3x+1 y=- 傾きが m, mzの2直線のな す鋭角を0とすると 図のように,2直線とx軸の正の向 きとのなす角を,それぞれ a, Bと すると,求める鋭角0は 0=B-a m-m。 1+m、m2 tan 0= 0 ¥3 V3 tan a= 2 ;x+1 別解 2直線は垂直でないから ソ= tan 8=-3/3 で, tan β-tan α 1+ tanBtan@ 3 tan 0= tan(8-α)= tan0 V3 2 V3 1+(-3/3)。=/3 V3 1+ 2 2 2 0<B<であるから 7/3 2 0= 直線 y=2x-1とx軸の正の向き |とのなす角をαとすると tanα=2 =3 2 y=2x) 0<0<号から 0=号 y=2x-1 42直線のなす角は, それぞ れと平行で原点を通る2直 線のなす角に等しい。そこ で,直線y=2x-1を平行 π tan α土tan 4 tan 0 1千tan a tan 移動した直線 y=2x をも とにした図をかくと, 見通 しがよくなる。 2土1 (複号同順) 1千2-1

なぜ青下線から赤下線のことが分かるのですか？

14 二項定理を用いて, 次のことを証明せよ。 ただし, nは2以上の整数とする >2 m (2) x>0 のとき (1+x)"21+nx+ n(n-1) 2 2

SDGSの英語長文問題です。 答えが配られなくて困っています、、 どなたか問題を解いていただきたいです

Before World War II, Japanese Consul-General Chiune Sugihara was sent to Kaunas to open a consulate service. Kaunas was the temporary capital of Lithuania at the time Reading Refugees in Recent Years J次の英文は第2次世界大戦当時、ナチスに迫害されていた多くのユタヤ人を救った杉原干動。 ついて書かれたものです。英文を読んで、問いに答えなさい。 For Chiune Sugihara u入 boobi 30 signi follim . Ba wrot be o chos. and was strategically situated between Germany and the Soviet Union. After Hitler.。 invasion of Poland on September 1, 1939, a wave of Jewish refugees living in Poland streamed into Lithuania. They escaped from Poland without possessions or money. By 1940, most of Western Europe had been conquered by the Nazis. Most free countries barred the immigration of Jewish refugees from Poland or anywhere in Nazi- occupied Europe. Germany and Soviets were approaching Lithuania rapidly. In July 1940, the Soviet authorities instructed all foreign embassies day to g 35 Lith the Ko all left immediately, but Sugihara managed to obtain permission to extend his Kaunas. Almost a 40 the STTOS stay. in 0quion as taqe On a summer morning in late July 1940, Consul Sugihara and his family awakened to a crowd of Polish-Jewish refugees gathered outside the consulate. Desperate to flee the q ynem CH approaching Nazis and Soviets, the refugees knew that their only path lay to the east. If Consul Sugihara them Japanese transit visas, they could race to possible re freedom. Sugihara was moved by their plight, but he did not have the authority to issue hundreds of visas without permission from the Foreign Ministry in Tokyo. Sugihara wired his government three times for permission to issue visas to the Jewish refugees. Three times he was denied. 45 u d 1 MOLIG- KOinE After repeatedly receiving negative responses from Tokyo, the Consul had a dificult decision to make. He was a man who was brought up in the strict and traditional : discipline of the Japanese. He was a career diplomat, who suddenly had to make a very difficult choice. On the one hand, he was bound by the traditional obedience he c all his life. On the other hand, he thought that he had to help those who were in need. He knew that if he defied the orders of his superiors, he might be fired and disgraced, and would probably never work for the Japanese government again. This # would result in extreme financial hardship for his family in the future. Sugihara even feared for the lives of himself, his wife and children, but in the end he just followed his conscience. The visas would be signed. 72

カッコに文章と一致する英単語を書くのですが、まったく分かりません😢 教えて頂きたいです🙇‍♀️

ぎの語句が意味する語を答え、下線部の意味も調べなさい 2) The top of layer of the earth in which plants, trees etc. grow (s 3) The measurement in degrees of how hot or cold a thing or place is (t 1) The science or practice of farming ( a へ へ 4) The amount of water in the air(h へ ) fo use more of something thanI necessary or useful ( w W 6) A place where you can buy and eat a meal ( r へ "A plant that is grown in large quantities, especially as food ( c amine people or things to see how thev are similar and how they are different (c 2 へ レ へ 99 To give something to someone or make it available for them to use (p 10) An amount of something that is provided or available to be used (s へ 11) The conditions that affect the behavior and development of someone or something (e へ 12) A substance obtained by or used in a chemical process (c へ 13) To gradually grow or become bigger, more advanced, stronger, etc (d 14) To be connected with something or someone ( r 15) A talk that is given to a group of people to teach them about a particular subiect, often as part of a university or college course ( 1

シャーペン書かれた回答では無理ですか？

7式の値/1文字消去,次数下げー 1 (ア) a+6+c=0のとき, a(+-)+6(-+-)+c(-+-)の値を求めよ。 (広島 C

至急教えてください

l docomo 11:23 94% Q&A ND 注) Saki: We are going to make a radio program and *broadcast b it at our school festival on October thirtieth. John, please write the main points in youy notebook. John: OK. na Saki: Thank you, John., Well, what kind of radio program can we make? vert ow sS9d"o John: I want to make one with many *contents. For example, a program with music, talking, news, and 36 SO on. 0 Kota: I agree. I sometimes listen to the radio. In some radio programs, people just talk and don't play music. I can'tenjoy that kind of radio program. So I think we should have both music and talking in our. program. divr eda.'T acsfy 180 892 2 o0 Saki: I think so, too. But different people like different 。 music. Some people like old songs, and others like popular songs. What should we do about it? John: How about playing different kinds of music? For example, we can play old songs in the morning and popular songs in the afternoon. Then a lot of people can enjoy the music in our program. Jan! oot salone Saki: That's a good idea, ,Let's get some CDs. And between music, we talk about some *topics, right? Kota: Yes. And we can have some *guests for the talking time. One of our teachers or some of our friends can be our guests. John: OK. What about news? Any interesting news? ュニ ロ 1 に ロ O 閉じる マイページ 公開ノ 塾選び Q&A

入る単語を教えてください

か 注) Saki: We are going to make a radio program and *broadcast bi it at our school festival on October thirtieth.John, please write the main points in youy' notebook. John: OK. Saki: Thank you, John. Well, what kind of radio program can we make? ooa vet ow S0 S79d/0 John: I want to make one with many *contents. For example, a program with music, talking, news, and 30 SO On. Kota: I agree. I sometimes listen to the radio. In some radio programs, people just talk and don't play music. I can'tenjoy that kind of radio program. So I think we should have both music and talking in our g program. はdaivw eaards.T assf 30 3894 8193 oal Saki: I think so, too. But different people like different music. Some people like old songs, and others like popular songs. What should we do about it? John: How about playing different kinds of music?For example, we can play old songs in the morming and popular songs in the afternoon. Then a lot of people can enjoy the music in our program.ant oot sdage t Saki: That's a good idea, Let's get some CDs. And between music, we talk about some *topics, right? Kota: Yes. And we can have some *guests for the talking time. One of our teachers or some of our friends can be our guests. John: OK. What about news? Any interesting news?

解説をお願いしたいです🙌🏻🙌🏻 答えの説明を見ても分からなくて🌀🌀

○線分の比と面積について理解を深める問題 *三角形の面積は底辺と高さの関係で決まるから, AE:EC=2:1より△BCE= △ABC 点Fと点Cを結ぶと, BF: FE=3:1より A 3 3 4 点Dは辺BCの中点だから 3 ABCE= 4 13 2) 3 ABCF= △ABC= AABC t 4 NE ABDF=;ABCF= 1 2 △ABC 2 C 1 8 △ABC= 8 B ×144=18cm D ニ 1

線形代数の行列式の因数分解が分からなくて困っています。解き方を教えて欲しいです。 至急です。よろしくお願いします。

hc th bc tc" 2 -hc Cata abta abe f 2 Ca CatC ーab

1番下の行はなんで＝0になるのですか?

くyく)のとき。 2 EX 116 a+B+y の値をすべて求めよ。 tana+tan8+tany=tanatan ftan y (一番くαく要ー号くBく祭一番くく)のとき tan a+ tan 8+ tan y=tanatanBtany 2 2' 2 Iiny 【東北大) 1>0 nsi お) ) 加法定理により tan(α+B)+tany 1-tan(α+B)tany tan (α+β+y)=tan{(α+8)+y}= tan α+tanβ 1-tan atanB +tany ロ分母·分子に tan a+ tan 8 1- 1-tan a tanβ S|1-tan atanβ を掛けて E+|整理する。 *tan y tan α+ tanβ+tany-tanatanβtany 1-tan atanβ-tanβtanY-tanytane ニ tan a+ tan β+ tan y=tanatanβtany であるから tan (α+β+y)=0