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

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🙇🏻‍♀️‪‪ また、間違ってる所はなぜ違うのかも教えて下さると嬉しいです😭

1. ( )に入れるのに適切なものを選びなさい。 1) He refused to lend me any more books, as I hadn't yet returned ( ) I got last time. 解答欄 1. (1) fee 2 fine it 2 one (3) the one ④that 2) Jane lent me ( 1 a her book ) last week. 2 a book of her (3) this book of her ③ cost 4 charge 1)__ Qis this book of hers 2)4 3) He parked in a no-parking zone, so the police made him pay a ( ) of ¥10,000. 4) Takeshi has a lot of ( ) to turn in tomorrow morning. assignments (2) duties (3) homeworks 5) We talked ( ) about what we ought to do. with each other 2 each another wit 3)_ 2 4 works 4)__ 3 with one other one another 5)__ 6) Proust and James are great novelists, and ( both 2 all 3 none 4) neither ) is easy to read. 6)

写真の2問がよく分かりません(並べ替え方) (問8は並べ替えた時に2番目と4番目にくるものを選ぶ→③が正解 問3は並べ替えた時に2番目と4番目にくるものを選ぶ。不要な語が1つある→①が正解) 問8はJohnをどこに持っていけばいいか迷いました 問3はwillをどこに持っ... 続きを読む

問8 32 ジョンはなんて上手に日本語を話すのでしょうが of Japanese p (ア) John(イ) good speaker (ウ) is (エ) what (オ) of (カ) (キ) Japanesey! 0 (ウ)(イ)(イ)と(キ) ③ (カ)と(オ) ④ (オ)とウア) 3 ./l し 1.21

間違っているところがあったら教えてください🙇‍♀️

Despite (3) Please remember ( be waked 2 In spite of③Although ④But for ) me up at 7 o'clock tomorrow so I can get to school on time. 2 to wake 3 waking (4) Take this coat to the laundry. It's so dirty that it ( 1 needs to wash 2 has it cleaned 4 woke 3 needs washing ①wants cleaned (5) We are likely to have a warm winter this year for the first time ( ①in ten years ③ past ten years (6) ( 2 over ten years' period ①ten years ago ) asked Michael about the matter, he wouldn't say a word. ①Anyone 2 Even if 3 However ) me go out with Tom. 2 allow 3 prevent (7) My father would not ( 1 let (8) But ( ①against ). (東京経済大) (玉川大) (立教大) ④Whoever (摂南大) ④ resist ) the rain and cold wind, we would have had a nice holiday. 2 from 3 of ④ for (西南学院大) (昭和女子大) (9) Miki and her family ( ) out of town. I have called several times, but there is no answer. I could go (10) ( 1 Either 2 must be 3 should go ) it is fine or not, the football game will take place. 2 Neither 3 Though (11) It's ( ) that I'd like to take my dog for a long walk. would be (南山大) ④Whether (獨協医大) ①such a beautiful day 2 a so beautiful day 3 such beautiful a day a beautiful day so (高知大 (12)( ) will be elected as the next chairperson? ①Do you think who 2 Do you think whom 3 Who do you think ④Whom do you think (国士 1 a day (14) To read a foreign language is ( 1 few 2 one 2 at a day 3 other (13) Here's your medicine. Take one capsule three times ( ) thing, to speak it is quite another. 5 this ④some 3 by a day ), after each meal. ④for a day (東北学

間違っているところがあったら教えていただきたいです🙇🏻‍♀️

6 CD Chacal the 1 Choose the best answer to fill in the blanks. (1) (1) ( ) the editor of this magazine? ①Do you know is who 3 Who do you know is 2 Do you know who is Who is do you know (関西 (2) Please keep your eyes ( 1 close 2 closing ) until I tell you to open them. 3 closed 4 to close (京 (3) One of the twins lives in Tokyo, but ( ) lives in New York. ①another 2 other 3 the other 4 the others (4) There is not much hope ( 1 as 2 how ) they are still alive. 3 that 4 which (5) The language ( ①speaking (6) He ( 1 should ) in the province is Arabic. 3 spoke 2 speak ) be sick. I just saw him playing soccer. ③ can't ④spoken (月 (7) It will not be long 1 before 2 may ) we meet again. 3 above 2 on ④ won't SET ④during (8) Tom may not have studied ( 2 as hard ①enough hard (9) There are many books worth ( ) to pass the entrance examination. 3 hard enough 4 hard as ) more than once. 3 reading to be read 1 read 2 to read (10) James found ( ①him ) difficult to write down foreign names. 2 himself 3 it ④them (11) They suggested that he ( ) to the meeting. 1 come 2 comes (3) came 4 had come (12) Hurry up! Our bus is leaving ( ) a few minutes. I till 2 on 3 during 4 in (13) You will miss the train ( ) you walk more quickly. 1 if (14)( How about 2 without 3 unless ) take the train instead of the bus? It's faster. ②Let's 3 Why don't ④but for ④Why not

語句整序問題でthat節を後ろに持ってきてしまったのですがこれは日本語訳から考えて不可ということでしょうか？教えて頂きたいです。宜しくお願い致します。

Htt )()() ( 6 the winter ③gotten > through ) ( ④ had )(). 冬を越した虫たちが活動を始めた。 The insects ( ( 2 became ① active 5 that 4 Hin I Liv 2

これであってますか、？toとmakeの来る位置が分からなくて適当に後ろに置きました、、

038 Can I ( ) ( ) ( ) ( ) ( ) ( ) ( )? Dan appointment Schecked eyes Shave Smake my to] () (4:30) Can I have @ an appointment eyes ⑦To make ? ⑤ cheacked @my

間違っているところがあったら教えていただきたいです🙇🏻‍♀️

(4) The new amusement park is ( ①fifth time as large 3 five times as large ) as the old one. 2 fifth time larger five times larger (東京経済大) (5) She was born ( 1 at ... by ... on ) Kyoto ( 2 in... on ... in ) July 7, 1977 ( 3 in... on... at ) 7:17 in the evening. 4 on... at... at (6) If I ( 1 win ) a million dollars in the lottery, I would travel around the world. (7) There isn't ( 2 won or 3 winning 229 4 will win ) information on this topic in the library. 3 an ④much nozze (京都産業大) ( 大阪商業大) (大) ) her mother did in the past. ①a few 2 many (8) She tries to do ( ①what 2 how (9) An event ( 3 introducing 3 when 4 which ) French culture was held at our university last week. 2 introduced ①having been introduced 4 which introduce (名城大) (京都産業大) (10) The new station building ( ) completed by the time you return from your year abroad ①will have been 2 has 4 to be (亜細亜大 3 has been (11) The window ( 1 leave ) open by the child. 2 leaves 3 left (12) I wanted to see ( Dif 2 while 3 who (13)( ) all the members had arrived. 4 which ) that this is a serious matter. ①You are important realizing ③You are important to realize was left (松山 ⑤ what (九州産 It is important for you realizing It is important for you to realize