なんでcos6分のπが2分のルート３になったのがわからないので教えて頂きたいです…

2 πT 1 302 (1) sin² = (1-cos)=(1-√3) 12 (+)-2-√3 = π >0であるから sin 172 sin πT 12 = 4 2-√3 N 4 6 = 4-2/3 8 (3+1)-2√3.1 8 5 = 2 √3-1 2√2 多くない 7 (2) cos². T= 12 √6-√2 4 S=7 1½ (1+ cos x) = 1/2(1+ (-√3)} 2-√3 == 4 6 2sin x 7 niz 200+ +8050 nie S= cos 12 7 COS- 12 < 0 であるから くと π== = 2-√3 4 2 2sin x - 2sin 4-2/3 8 (S) (3+1)-2√3.1 8 √√3-1 2/2 - Unia 4

マーカー引いたらところのなぜ1が0から2分の3になるのかがわからないです… 鋭角だから90°までじゃないのですか？

のよう 297 tan (a+β)=1tanatanβ tana + tan β 7 299 2+5 右の OP=r, =1-2.5 = 9 角をα, 点 Q であるから tan (a+β+r)=tan{ (a +β)+r} Des tan (a + β) + tanr_ (1) P(3,4) か 3=rcos 4=rsin = また,Q 7 9 -=10 OQ と 1. 1-tan (a+β)tany α, β, rは鋭角であるから 3 0<a+B+<* - +8 7 9 .8 よって, tan(a+β+r) = 1からき 5 TT π a+B+r= 4 4 のなす角 るから よって, x= 一方, tana=2>1より,a> であるから y= π a + B + r > とする 4 ある。 5 したがって ar + = 1 + 1 した

三角関数の加法定理の問題なのですがなんでtan1が45°になるのですか？ 図を使って教えていただけると嬉しいです！

下線部（1）の文構造が分かりません。特に2行目の文構造が分かりません。強調のdoであることは分かりますが、その後のthat以降が関係詞？かすらも分からないので、誰か教えて下さい！

次の英文は1991年に出版された本からのもので、 研究分野としての「人工知 能」 (Artificial Intelligence) について述べています。 下線部(1)~(3)を日本語に訳 しなさい。 What is Artificial Intelligence (AI)? Just about the only characterization of Al that would meet with universal acceptance is that it involves trying to make machines do tasks which are normally seen as requiring intelligence. There are countless refinements of this characterization: what sort of machines we want to consider; how we decide what tasks require intelligence and so on. One of the most important questions concerns the reasons why we want to make machines do such tasks. AI has always been split between people who want to make machines do tasks that require intelligence because they want more useful machines, and people who want to do it because they see it as a way of exploring how humans do such tasks. We will call the two approaches the engineering approach and the cognitive-science respectively. (2) (1) approach The techniques required for the two approaches are not always very different. For many of the tasks that engineering AI wants solutions to, the only systems we know about that can perform them are humans), so that, at least initially, the obvious way to design solutions is to try to mimic what we know about humans. For many of the tasks that cognitive-science Al wants solutions to, the evidence on how humans do them is too hard to interpret to enable us to construct computational models, so the only approach is to try to design solutions from scratch" and then see how well they fit what we know about humans. The main visible difference between the two approaches is in (3) their criteria for success; an engineer would be delighted to have create something that outperformed a person; a cognitive scientist would regard it as a failure. -1- M7 (492-61

読み方(カタガナで)教えて欲しいです。 左から順に

A big, old tree stands by a road near the city of Hiroshima. Through the years, it has seen many things. One summer night, the tree heard a lullaby. A mother was singing to her little girl under the tree. 5 They looked happy, and the song sounded sweet. But the tree remembered something sad. "Yes. It was some eighty years ago. I heard a lullaby that night, too." [68 words] bas

3.4枚目が問題文、5枚目が答え、1.2枚目は問題を解くときに必要な文です。 なぜこの答えになるのかがわからないので教えてください。 解くのは大変だと思うので、一問だけでも大丈夫です。

2 次は, 高校1年生の Yusuke が書いた英文です。 これを読んで、 問1~間6に答えなさい。*印 のついている語句には、本文のあとに 〔注〕があります。(34点) My father loves *dinosaurs and *fossils. He (he/them/in/collects/is/that/interested /so) dinosaur toys, small fossils and books about dinosaurs. I heard he tried to find fossils along the river with my grandparents when he was young. When I was younger, my family took me to the science museum every year. My father loved looking at the dinosaur fossils there, and he always explained them to me. So, I got interested in dinosaurs and fossils, too. My father has a restaurant near our house, and he displays some dinosaur teeth fossils in the restaurant. One day, he introduced one of his customers to me. The man, Mr. Shirai, also loved dinosaurs and fossils, and often visited museums all around the world, such as in America, Canada and China. He realized that my father was interested in the same things because of the fossils in the restaurant. They became good friends. One day in September, Mr. Shirai came to my father's restaurant and showed me a fossil. It was a beautiful fish fossil in a brown stone plate. I was surprised to see it, Mr. Shirai A me a lot about the fossil. He traveled to Germany to look for fossils, and he found many fossils there such as fish, animal bones and leaves. The area is very famous for "archaeopteryx fossils. I once saw a picture of the archaeopteryx fossil in a book, so I wanted to go to see the fossil in -4-

現在完了形の文で、agoをつけないのはなぜですか？

Some say the Taj Mahal is the most beautiful building in the world. この文章を原級に書き換えていただきたいです。 よろしくお願いいたします🙇‍♀️

1️⃣の(1)〜(7)の答え合わせをしたいのですが 答え教えて欲しいです。

にあてはまる語を書きなさい。 □(1) 父は毎日たくさん書類を読みます。 My father reads papers every day. (2) ウエダ先生は授業を始める前に、私をみんなに紹介しました。 文法 Before Mr. Ueda began the class, he 1 次の英文を ( 内の指示にしたがって書きかえなさい。 me everyone. (1) Let's buy some ice cream. (下線部について has a lot of fruit in it という説明を加えた文に) (2) He showed me a picture. (下線部について looked very old という説明を加えた文に) □(3) Did you see the car? (下線部について passed *in front of that building just now という説明を加えた文に) □ (4) This is a bottle. The bottle has a red cap. (関係代名詞を使って1文に ) *in front of...:…の前に 口(5) The boy has some books. The books have a lot of pictures in them. (関係代名詞を使って1文に □(3) 父は母が My father wants to g 4) 生徒たちは地球を救うよ 2 The students want t )内の語 (句) を使っ □1) これがコンピューターG 2)その老人はすばらしい音 次の質問に関係代名詞を □ What kind of robot d □ (6) My brother bought a car. The car has only two doors. (関係代名詞を使って1文に □(7) I need a bag. The bag can hold all of my textbooks. (関係代名詞を使って1文に) 重要次の日本文になる女になるときに リーディング 次の英文を ジンが夏休みの思い出に This summer I we Japanese popular musicians. The

この7問の答えを教えていただきたいです。 特に②.③をお答えいただけるととってもありがたいです。 よろしくお願いいたします！！

buot ad oot Ex. 4 Change the sentences as indicated. od A do not fal sd. €981 ni vedmo!! 1 She does not dance as beautifully as you do. (= Her dancing...) ②It's the most annoying thing to have an electric power failure while watching your favorite TV program. (= Nothing...) semid gnilob)noiulovat lutong airf bonne Nagasaki has one-tenth as many people as Kolkata. (= The population of Kolkata...) In The Taj Mahal is one of the most beautiful buildings. (= Few ...) niaga bas andled 5 Some say the Taj Mahal is the most beautiful building in the world. (Use the positive 2401 ni aibol of giants a ⑥The Todaiji temple is twice the age of the Taj Mahal. (Use an adjective.) form of the adjective.) ⑦A goat is about as big as a sheep. (Use a noun instead of big.) 175