全くわからないです。 B＝45って、どこからきたのですか？ 優しい方詳しく説明教えてください！ 【2】

基本 基本 例題 148 正弦定理の利用 △ABCにおいて、 外接円の半径をRとする。 次のものを求めよ。 (1) b=4,B=30°C=105° のときaとR a=√6,b=2, A=60°のとき BとC (3) c=R, B=20°のとき A 指針 三角形の1辺とその対角の関係には =2RI a 正弦定理 sin C sin B sin A (Rは△ABCの外接円の半径) の利用を考える。条件に応じて必要な等式を取り出して使う。 また, A+B+C=180° (三角形の内角の和は180°) も利用。 (2),(3) 正弦定理から, sin0=kの形が得られる。これから0を決 めるときは, A+B+C=180° を満たすかどうかに注意する。 解答 (1) A=180°-(B+C)=180°-(30°+105°)=45° a 4 正弦定理により =2R sin45° sin 30 よって a= R= ₂ Ch ! (2) 正弦定理により √6 sin 60° sin B ゆえに sin B= 2 //56 - sin 60°= √2 0°<B <180°-Aより0°<B <120° で B あるから B=45° √6 よって C=180°-(A+B)=180°(60°+45°)=75° (3) 正弦定理により C =2R c=Rから sinC=1 sin C 0°C <180°-Bより0° <C<160° であるから C=30℃ 150° 2 C=30° A=180°~(20°+30°)=130° C=150 のとき 20 A=180° (20°+150°) = 10° BR- 意外接円の中心を0とすると, △OABは正三角形で,∠CはABに対す あることに着目してもよい。 4sin 45° sin 30° 4 2sin 30° ・1/1/12 & +2=4√2 B 105 [ 4 2 4 p.230 基本 SIN まず、左のよう A+B+C=180 て残りの角 a 4 sin 45 sin, 4 -=2RT. sin 30° ya 135 0

【不定詞】 becomingで代用が出来ないのは何故ですか。

CH 2 不定詞が直前の名 ried to save OR ◎ 111 TARGET We were surprised at her decision to become an actress. 私たちは,女優になるという彼女の決心に驚いた。 ●名詞の内容を説明例文では,不定詞の直前にある名詞 her decision (彼) E 女の決心)がどういうものかを, to become an actressと いう不定詞が説明している。 このように, 不定詞が直前の 名詞の具体的な内容を説明することがある。 howen grid We were surprised at her decision to become an actress. (D) gnidtqns この場合, Her decision is to become an actress. という文をつくることができる。 Witiw soirw of grunow sven novoc PLUS 25 「同格」を表す不定詞 TARGET 111 のように不定詞が直前の名詞の内容を説明する場合, 直前の名 詞と不定詞の関係は「同格」(p.481,483) と呼ばれる。 不定詞と同格の関係にある 名詞は, 不定詞を目的語にする他動詞や不定詞を伴う形容詞から派生したものが多 い。たとえば, decision は decide to do (~する決心をする) の decide から派生し た名詞で, her decision to become an actress は She decided to become an actress. を名詞化した表現である(p.452)。 のに 3 不定詞 Parou

どうして不斉炭素原子といえるのでしょうか？ Cの周りが違う原子でなきゃいけないのに、Cが二つあります。どうしてこう言えるのでしょうか？

(0) 21248 SACH-FOCSOVER 〒112-ジクロロプロパン 不斉炭素原子 * CH³-CH=CH ₂ T CI #30 (SS) (S_I) = (xx) (S) V $650 H 1* *C-CH (SS) (D)=(xx): @ (e) H ClClas TE>&O (A) OSAMNOM

答えと、なぜその答えになるのか教えてほしいです。 分かる所だけでも構いません。 よろしくおねがいします。

(2) few of a 100 1 few ) snowy days here. 9. Last year we had ( 3 little 2 few 4 much (X) 1 a little 10. A: Are your parents travelling with you? B: No, not ( ); Mother only. 1 each 2 one 3 either 4 both (LX) 11. It is said that the poor are not ( ) unhappy. 4 sometimes (+) 1 always 3 sacredly 2 hardly 12. I've never been to New York, and my sister hasn't, ( ). 1 neither (2) either (3) too 4 both (MX) 13. He is the ( ) person to tell a lie. 4 least (1) 1 last 2 late 3 later 14. ( ) man can be a president. 1 Not all 2 Not necessarily 3 Not every 15. He is ( ) no means a nice person. 1 at 2 for 3 by 4 to (X) We had to make a quick decision. There was ( enough (2) little (3) few 4 much 16. 4 All but (RAKTE ) time to think. (4)

4.のnothingがなぜこの位置に来ているのか分かりません。 matterの使い方含め教えて欲しいです🙇‍♀️

My mother asked me ( how long did it take how it took long →完全 ) to clean my room. 3. I wondered It 1 what (2) which 3 why 4. It mattered nothing to him ( ) she wore to the party. 1 what 2 that (3) who (4) 5. He asked me ( ) I had slept well the night before.> S 1 which 2 what 3 if 6. His excuse was ( ) he had been ill in bed. 3 that when (2) how did it take long how long it took Helen was so late.] (3) whether whose opinion whose 4 that 4) if

163 3になる根拠を教えてください🙏

163 The chairperson made that we all got bored. ①1 a so long speech 2 such long a speech 3 so long a speech 4 a such long speech〈東邦大〉 ③訳議長が非常に長い演説をしたの で,私たちはみなうんざりしてしま った。

英語の読解問題です。これで合っているでしょうか？

Answer the following three questions. toomoo ert ez0000 Coffee House, "Cafe Monami" sells coffee beans at the following price. 100g 300g wwwww 200g 32 dollars Blue Mountain 16 dollars 48 dollars TAARIKETAKOOOSS Kona ispone 14 dollars ni erib 28 dollars w units 42 dollars Kilimanjaro 4 dollars 8 dollars 12 dollars .......... Mocha 4.5 dollars 9 dollars 13.5 dollars Guatemala 8 dollars 12 dollars www.......................... 4 dollars 3.5 dollars Colombia 7 dollars mo 10.5 dollars nou We are offering a free ticket for a cup of coffee to customers who buy coffee beans at our shop from April 1 to April 30. This free ticket is valid for the first two weeks in May. Moreover, to celebrate our fifth anniversary, we have launched a new service for members which allows members to get five percent off every time they make a purchase at our shop. Since there are no annual membership fees, please take this opportunity to become a member. Kec prisilskega (0) esilaidegal yllsidega (8) leibega (A) 2 9. Which coffee beans can customers buy at the lowest price when they want to breqe 120 buy 200g? lisa(8)) yud (A) .3 A (A) Colombia (B) Mocha (C) Kona evol of (D) Blue Mountain gnival bevol (A) T 10. In what month can customers use a free ticket for a cup of coffee? (A) April (B) May (C) June (D) July A So be Loy lbenque ad b'il. (A) 8 kas b'ew (8) blool ms I (0) 11. Which is the correct information? qan sid A Kilimanjaro is the third most expensive coffee at this shop.olxool W You have to pay an annual membership fee if you want to be a member of this shop. If customers buy coffee beans on April 5, they can get a free ticket for a cup of coffee. More than six years have passed since the founding of Café Monami. C's quich 21D DE

文構造教えて下さい🙇‍♂️

(4) Japan has one of the best education systems in the world, a system which is supported by a society ( ) learning has traditionally been valued highly. in which 2 that is 3 when 4 which PODO sd (

量が多くて申し訳ないです。 19、25、26は何が当てはまるのでしょうか。 また書いてあるところは合ってますか？ よろしくお願いします。

口07 Mr. Bell is the person ( )I obtained the information. の for what 2 from whom 3 with whose の to who 〈法政大) )I referred The professor sternly told the student, “Read the passage in my lecture." O that |08 2 to that 3 to which のwhich (センター試験) )you spent your childhood years? 3which 口09 Do you remember the house ( Owhere 2when の of which 〈芝浦工業大) 口10 Ghibli Museum is a place ( )I want to visit. のwhere 2 to where 3 to which の which 〈杏林大) He has been in the hospital for two weeks. That's ( today. ) he can't come O because 2 how 3why の the way 〈東京電機大) 口12 He talked about one of Salinger's novels ( ①which )I can't remember the title. whose 3whatever の of which 〈防衛大学校) 口13 He said he couldn't speak Russian, ( )was untrue. Owhich 2what 3why の how 〈名古屋外国語大) 口14 There are often special box seats at sports stadiums, ( watch games with food and drinks. )people can Owhere 2wherever 3which のwhichever 〈日本大) 口15 There was no objection from the man ( のof whom )I thought was sure to protest. 2 on whom 3who の by whom く桜美林大) 16 Last winter I went to Hong Kong, ( as warm as I had expected. Owhen wasn't 2where it wasn't where wasn't ④which it wasn't くセンター試験) 口17 seems easy at first often turns out to be difficult. O It 2 That 3 What の Which くセンター試験) The school is quite different from ( )it was ten years ago. (Owhich 2 that 3 as のwhat 〈東京経済大)

至急お願いいたします。 間違ってるところを教えてください。

he sea. Ken. I thought he was Kenji. の空欄に入るのに最も適切なものを記号で選びなさい。 The man( )is now. speaking on TV is our prime minister. 2 who の which ③whom の what The girl to ( )you gave a book is standing there. Owho のwhich 3 whom の what I can't forget the day ( )I graduated from the school. の who 2 where ()when の which He always did ( ) he wanted to do. の who 2 which ③ whose what We dashed to the room ( )the strange sound had come. の which 2 who 3 from whom 4 from which This is the hotel ( ) the Beetles stayed before. の/which 2 who ③ where ④ that The reason ( )she gave me was a lie. の who (why 3 when の which I love writers ( ) works are popular overseas. ② which whose の that 1who This is ( ) she usually memorizes new songs. (のAo の which now の what 2 the way how ) she wanted to go to on the map. He showed the building ( の when 2 who 3 where Dwhich う文を日本語に直しなさい。 hor sister was actually her mother.