cos<OCBでce/ocじゃなくてbc/ocじゃだめなんですか？

◆◆思考の流れ (前半) 三角比の定義を使って考える。 CD は余弦定理, Rは正弦定理を利用する。 (後半) LOCA = ∠OCE +90° を利用する。 sin B=- AC 3 = AB 5' BC cos ZB= AB-5 ABCDにおいて, 余弦定理により CD2=BC2+BD2 -2BC・BDcos B =42+32-2・4・3・ 4 29 = 5 29 √145 よって CD= = 5 B また, BCD において, 正弦定理により CD 1 R= . 2 sin B-2 1455 145 = 5 6 BCの中点をEとすると, △OCB 2 311 C はOC=OBの二等辺三角形である。 BC よって CE= =2 2 3. したがって E... 2 C cos ZOCB=OC CE 0 145 6 6 =2.. √145 12/145 = 145 さらに,∠OCA=∠OCE +90° であるから S=1/2CA·COsin LOCA ==CA.COsin(LOCE+90°) = 1/13.3.145 √145 -COS ∠OCE 6 =12.3.145.12.145 6 =3 145 別解 OCAについて, CA を底辺, CE を高さと 考えると S=1/2CA·CE=1/2.3.2=3

間違っているところがあったら教えてください🙇‍♂️

1 Choose the best answer to fill in the blanks. (81) (1) Peter ( 1 teaches 3 will teach ) for ten years next month. 2 will be teaching will have taught /13 ( 東京電機大 ) (2) In my class, there are three students from abroad. One is from England and ( are from Australia. ①another (3) Our teacher is ( 2 others 3 the other the others ) to come by the time we promised to get together. 2 possible 3 probable A definite ) of the two men standing at the gate. I likely (4) My father is ( 1 more tall 2 taller (5) My parents objected ( ①to my climbing 3 the tall ) the mountain alone in winter. 2me of climbing 4 on me to climb the taller (京都産業大) (関西学院大) (近畿大) ト TИIO (千葉工業大) hearing (実践女子大 ). to consider (摂南 3 me to climbing (6) She had to shout to make herself ( I have heard 2 hear ③ heard (7) The project could be called a success, all things ( 2 considered 3 considering ) the sky, it will rain this afternoon. 1 consider (8)( ①Judging from 3 Though 2 Generally speaking ④It being (9) You must leave now; ( ), you will be late for your social studies class. ①instead 2 therefore 3 otherwise accordingly (10) We are now in the ( ) half of our training camp. 1 late 2 latter 3 later ④last ) wise and hardworking. 3 need ④needed (大阪学 (センタ (11) All teachers and students are not ( ①necessarily (12)( 2 necessary ) had the war begun when ①The moment ? No wonder terrorists hijacked a plane. 3 Hardly (13) Next week's seminar ought to provide ( 1 ours our ④As soon as ) with a lot of new information. ourselves 4 us

分からないので教えてください🙇‍♂️

1 before 2 by ③ so 3 W Choose the best answer to fill in the blanks. (1) (1) This book ( 1 says ) you everything that you want to know about English grammar. 2 speaks 3 tells (2) I'm going shopping now, but I'll be back ( knows ( 大阪経済 (千葉工 ) long. 4 within (3) It is high time we ( ①discuss ) the environmental problem. 2 discuss on 3 discuss about ( 4 discussed (4) When and where did you ( ) to know her? ①reach 2 come 3 become ④arrive (E (5) I am sure that the new model ( ) well. ①will be sold 2 will sell ③3 is sold ④selling (6) Something is wrong ( ) this computer. 1 in 2 with 3 about ④by ⑤ at

合っているか教えてください🙇‍♂️

LES AR ① ② LESSO 1 Choose the best answer to fill in the blanks. (1) (1) Do you feel like ( 1 go ) for a swim? 2 to go 3 going (2) The market share of imported grapes is larger than that of domestic ( 1 one 2 ones 3 that ). IM お having gone nin関西外国語大 those (近畿) ob \bed of) H 4 talked 3 talk (鹿児島国際大) ) in the garden. 3 playing 4 being played in qu ). 3 it (4 one (愛知 (3) Once you meet her, you'll find that she is nice to ( talk to her 2 talk to (4) The children are outside. I can see them ( ①to play 2 to be playing (5) As I had my bicycle stolen, I bought a new ( 1 another 2 other (6) When (r) Mr. Jackson? (桜美 ①have you met 2 did you meet 3 you have met 4 have met you (7)( ) his homework, he couldn't go swimming. Finishing not 2 Not being finished Not having finished of TH (8)( 3 Not finished ) you were coming, I would have invited you to lunch. Je ①If I have known 3 Had I known ? Should I know ④If I know (9) He ( ) have done it by himself; somebody must have helped him. ①must 2 has to (10) I wanted some potatoes, but there were ( ④can't pt 3 can ). 1 none 2 no other 3 no things ④no one ( (11) He was seen ( ) out of the room. 1 go 2 gone 3 having gone 4 to go (同+O

合ってるか見てほしいです😭

14) That lawyer has not had a lot of ( ). clients 2 customers 15) We don't have ( ) furniture. 1 a single 2 many 3 consumers guests 3 many a much 16) The teacher gave each child ( ) advice. 1 an (4) some 17) Can you tell the difference between rice grown in Japan and ( 2 many 3 one ①American one ②American rice ③ one of America )? 14). 15). 4 16) 4 ④rice of America 17)_ 2 2. 下線部と同意のものを選びなさい。 1) The members arrived there in succession. ①in turns 2 one another 2. 1) 3 3 each other ④one after another 2) I would cry by myself in my room. 2) as much as possible 2 in a loud voice 3 beside my mother ②①: Halo:_:_e 3.日本語に合うように [ ]内の語句を並べかえ, 2番目と4番目の語を答えなさい。 あいさつの仕方は国によって異なる。 The way people greet differs [①country to another 3 from one 5 other ]. 3. 2番 4番 2 (1不要)

合ってるか見てほしいです🙇🏻‍♀️‪‪

7) Jim has three brothers. One is a doctor, and ( ) are computer scientists. 1 another 2 others (3) ③ the other the others 8) Some people are very selfish. They only think of ( them 2)themselves 3) oneself ). 4 theirselves 9) A ( ) is the money that you pay for a journey made, for example, by bus, train, or taxi. 1 charge (2) cost 10) ( (3) f 3 fare 4 fee ③That Those (4) ) present at the meeting supported the bill. 1 This (2) These 11) The climate of Siberia is not so mild as ( ) of Japan. that (2) those (3) this it 12) In ( ) six months you will be able to speak fluent French. Dother 2) another Pinare 13) Do you have ( ) about this city? any information 3 many informations 4 the other 2 some informations 4 any informations 7) 4 8)_2 9) 3 10)_4 11)_ 12) 3 333 13)

(1)1 (2)2 (3)3 で合っているか教えてください🙇🏻‍♀️

3 Choose the best answer to fill in the blanks. (1) (1) Fanny: Thank you very much for all your trouble. Walter: ( I don't care. ) You don't mind. 2 It's not worth it. Don't mention it. (2) Mother : I just baked a cake with a new recipe. ) Daughter: Wow! ( Mother : Just wait a while. It needs to cool down. Daughter: I can't wait to try it. ①How did you get the recipe? botubnos 2 Can I have some? ned 4 How long did it take? Tiaoq ed i bla Isa 3 Can I help you? (3) A: ( ) trods be Os bensqm " bazagn B: Well, that depends. Do you want to travel by plane or by train? A: I think that I want to take a flight. B: That will take approximately one hour and a half, I guess.ow aid b 1 How far is it from Tokyo to Sapporo? ? How much is a flight ticket from Tokyo to Sapporo? 3 How long does it take to go from Tokyo to Sapporo? 4 How often is there a train from Tokyo to Sapporo?

答えあっていますでしょうか、、🥲🥲

? ) to learn computer skills. 14. We ( tried 2 challenged 15. My bike needs ( 1 fixed Try To do ~しようとする 3 quit 4 practiced 〈 桃山学院大 〉 need doing ). Where do you usually get your bike fixed? 2 fixing 16. The paint in this room is fading. It needs ( あせる 1 to painting 3 to be painted ~されることが必要 <京都産業大〉 = need to be done =wart doing 3 for fixing 4 to fix ) again. 2 having painting ④ 4 have painted 〈名古屋学院大〉 外がくらくなるまで入 let 4 to play たた 役 <日本大〉 動詞 ) in the park until it got dark outside. 3 played 17. Catherine let her children ( ⑩play 2 playing qualow qui amplew of & 18. The trainer ( 1 got ) the elephant enter the cage by beating it with a stick. 2 let sulin.3 made os ang forced an④forced 19. I'd like to have him ( ) us with the work. (使役>Aを~してもらう ⑩help 9m 12 2 helped 20. We should have some of our money ( 対哭してしまいなさい been exchanged 3 exchanged (本日) 3 helping 4to help Vi oram not un mafe 〈高知大〉 〈東京医科大〉 ) for dollars at the airport. 3> A) 2 exchange ④exchanging ☐ 21. I had my bag () while I was sleeping in the train. 1 to steal 2 stolen (大林香) Bojem of 26 16 ③ steal toism of <> Am743 mod owl ( ) haqqda ★) wone (1) stealing gabojem s 〈北陸大〉

22番23番が分かりません、、訳も教えていただけたら嬉しいです😭😭 ほかの2問もあっていますでしょうか、、😭😭 回答よろしくお願いします🥲🥲

2 次の英文の下線部には誤っている箇所が1箇所ある。 その番号を選び、正しい形に直しなさい。 何人かの科学実験での動物の使い方について反対している人々がビルの外でデモをおこした。 20. Some people oppose the use of animals in scientific experiments demonstrated outside the building, opposing 反対している人々っていう動詞を修飾してるから Dieux of (立命館大 人は反対する→能動 4- 21. I saw some rats eaten my cake when I entered the kitchen early in the morning. ネズミ eating ③ ネズミがケーキを食べる能動だから 22. 氷山 deaths of some 1,500 passengers. Struck an iceberg, the British liner Titanic sank on its first voyage, ② 23. With more elderly people are driving these days, new licenses have been introduced by the Japanese police guone. @broke 〈北里大〉 resulting in the begameb D 〈南山大 〉 99smusb (8) at mid wea 〈南山大 〉 regulations for renewing driver's

11番の訳も答えも全く分かりません、、分詞構文の問題で、notは分詞構文の直前に置くから②か③だよなって思って訳してみようと思ったけど全然わからないです😭😭 ほかの問題もあっていますでしょうか🥲🥲

① surround 私は彼がたくさんの写真家に囲まれているのを見た 7. I saw him ( ) by many photographers. orld Bombermintinand sundesansol ②surrounded ③ surrounding ④ surrounds 私はなんとか私の不完全な英語で自分の考えを理解してもらった。 damaging < 松山大 〉 7 彼は囲まれるという受動関係 < 駒澤大 > 分詞 ① understand (2 understood ③ understanding ④ to understand 電車はヒロシア駅を10時に出発して、トーキョーに2:20につく □ 9. The train left Hiroshima at ten, ( 8. I managed to make myself (in my broken English. make myself understood で 自分の考えを理解してもらう 〈 淑徳大〉 <付帯状況>そして~する ) in Tokyo at two twenty. ① arrive ②arrived ③ arriving ④ to arrive 〈近畿大 〉 晴れた日なので、犬の散歩に出かけた <理由>~なので 68 10. ( ') a fine day, I went out for a walk with my dog. ① Because being ② Been ? ③ It being 主語が天候と私とでちがうから、意味の ④ It is 主語を分詞の前にお近 「独立分詞構文」 〈近畿大〉 11. The pickpocket hid behind a statue. The policemen ran ahead, ( ) that they had just すり かくれた passed by the man they were running after. おいこす ① not to know ② not known 先立って ③ not knowing ④ having not known 〈北陸大〉