このBCがsinになる場合とtanになる場合ってどんな時ですか！😭

p.1399 210 次の問に答えよ。 (1) A=45, C = 90°, [AB-8 ABC において, AC, BC を求めよ。 AC = ABcos A <= 8 cos45° = 8x BC = ABsin A = 8sin45° = 8x 1/12 7/2 = 4√2 (2) 4-60 (2) [A = 60°, C = 90°, [AB = 10) =A* ABC において, AC, BC を求めよ。 AC = AB cos A = 10 cos60° = 10 X = = 5 BC = ABsin A 10sin60° = 10 X 2 = 5√3 √√3 2 FBC = ACtan A BC = 6tan 30° A (3) A = 30°, C = 90°, AC=6L ABC において, BC を求めよ。 35 = 6× N = 2√3 3 P. 211: (1) (2

この√を使った掛け算のやり方となぜ45°が√2分の1に変化したのか教えて欲しいです💦💦🙇‍♀️

教 p.139 問9 210 次の問に答えよ。 (1) A=45°, C = 90°, AB=8 = ABC において, AC, BC を求めよ。 AC = AB cos A = 8 cos45° 1 √2 = 8 x = 4√2 BC = ABsin A = = 8sin45° = 8× = 4√√/2 A 1 2 (S)

3番の問題お願いします。thatは同格ですか？ 答えを忘れてしまいわかりません

6 次の文章を読み、 あとに続く問いに答えなさい。 Dear Ms. Tanaka: Thank you for your message. I understand your anxiety. Some years ago, we decided to keep manga in our library because they had become an important part of Japanese culture. We asked the librarian, ( a ) is an expert on choosing books, to select them. Manga are chosen based (b) the policy that they have something to do ( c ) school subjects such as history, science, or Japanese literature. Some manga that provide valuable life lessons are also selected. Therefore, I'm convinced that the manga in our library are valuable. You pointed out that your daughter reads the same titles repeatedly. According (d) the librarian, good manga and books often give a student different perspectives upon each reading. 7) If your daughter is absorbed in the same manga, she is learning, which is actually very Morinen) u valuable. 1 ) Try to limit your daughter's manga reading to one hour per day. Also, the next time you come to school, please visit the library and look through some manga. They may give you a new perspective. Sincerely yours, Dr. Charles Pepper QQ(a)に入る適切な関係詞を書きなさい。 2. (b)(d)に入る適切な前置詞をそれぞれ書きなさい。 C on with @ 96 3. 次の文の下線部の that と同じ用法のものを、 本文中の ① ~ ④ の中から選び, 番号で答えなさい。 その Fler po The rumor that they had gotten married turned out to be true. ~26750823 LE1 who

空所2に入るものを選べ。 1.important 2.interesting 3.active 4.ambitious 答えは3なのですが、何故ですか？ importantはダメですか？

If you are asked why you study, your obvious answer is that your studies will be useful because you will profit by the knowledge and the work habits that you acquire. You will apply the things you learn, not merely in making a success of your vocation, but also in all your thinking, talking, and writing, and in conduct of the most varied sorts. When you think through new problems or draw new conclusions, you are using your knowledge. ( 1).(when you give advice or information to or discuss issues with your friends and when you write, plan, or take action in social and political affairs in everything you do -you are using your knowledge. The one great aim of all your study is increased efficiency of thought and action through putting your knowledge and skill to use. Using knowledge is not only the aim of your studying; it is the very essence of the study process. Knowledge is not something that you can absorb and hold for later use. Knowledge is acquired only through thinking and doing. The material in books becomes part of your mental equipment only when you succeed in tying it to the rest of your knowledge and use your ideas in relation to one another. The common saying "We learn through doing" says it all. Learning is an (2) process. In order to acquire new ideas, you must react to them, put them to use, talk and write about them, and act upon them.

この問題の式と答えを教えていただきたいです！

[13 次の数について,正の約数は何個あるか。 (1) 192 (2) 800 14 ちまたは7 648 の正の約数の個数と、その約数全体の和を求めよ。 1903 38 40 SA ABSS804AT-BABOONE

書き換えの問題です。

83 各文をかっこ内に示された種類の文に書換えよ。 1. How can the news be true? [平叙文〕 (中央大) 2. Who that has any sense of honor can stand such an insult? [平叙文] (東京経大) 3. Everybody knows that. [反語形式 [=修辞疑問文] に〕 (一橋大) 4. Everybody desires to promote the welfare of the society. [Who を主語に] (愛媛大) The engine makes such a noise. [感嘆文] (福岡女大) It was very stupid of me to make such a mistake. [感嘆文] (三重大) 7. If you don't make haste, you will miss the train. [命令文] (東京理大) 5. 6. 8. If only I had never made such a promise! [平叙文〕 9. All the foreign guests were not present. [同じ意味の肯定文〕 (武蔵大) (慶大)

数IIの三角関数です。 赤ラインを引いたところから何をしているのか分かりません。 青ペンでカッコをつけたところまでの解説をしていただけると嬉しいです。

Think 例題 151 図形への応用 長さ1の線分ABを直径とする円周上の1点をPとし, PAB=0 とする。 のとき, 3AP+4BP の 最大値と最小値を求めよ. 解答 T T MOST 考え方] 三角関数の合成公式 asin0+bcos0=√a²+b2sin (0+α) を利用する. 100=1/5における0+α=xの変域を調べ、y=a+b singのグラフで考える。 3AP+4BP=3cos0+4sin0=y とおくと (0+α) y = 4sin0+3cos0=5sin 3 15' ただし, ∠APB= より AP=ABcos0= cos0, BP=ABsin0=sin0 =よ 2 sin a=- となるから, 0+α=x とおくと, y=5sinx であり, TU より。 Tr.. << 2 1 3 √2 また、 3 TU 2 TU cosa= (0<a<) <a<14 TL よって、a+ 6 TU a+≤x≤a +1 6 4 5 TU , sin <sin a <sin 12 TU ? <a+</27/ 3 12 =5sinx のグラフは右の図のようになる。 つまり, TU したがって, yはx=0+α= 07-αのとき最大となり,最大値は、 5sin 7=5 2 A yA 3√3+4 2 50 **** 最小 a+ Ho 0 B α+ られないので、値の範囲を しほりこんでおく。 na -4 15 x -5 205 α+1号の値は求め a+ 5 7 3 また sin (+)<sin 1/12=sin 1/12 <sin (a+2) より.yは x - 最大 y=5sinx TC 5 TU 7 π 3/127212 T a+ CON 52 3 100% x=0+α=a+1/つまり、9=7のとき最小となり、最小値は、 (3√3 4 5sin(a+)-sine cas+cosasin =)-(312) 3√3+4 2 6 以上より, 最大値 5, 最小値 第4

不等式の証明 ⑵について 写真のような解答は◯でしょうか？ 正答は最後の写真です。

: 20: 第1章 式と証明 8 不等式の証明 (2) 相加平均 相乗平均 重要例題 26 x>0,y>0 のとき,次の不等式を証明せよ。 また, 等号が 成り立つのはどのようなときか。 8 (1) x+ ≧4√2 x ポイント1 相加平均と相乗平均の大小関係 a+b α > 0,6>0 のとき -Z√ab 2 等号が成り立つのは α=6のとき。 (2) (3x + 1 ) ( ² + + v) ² +y≧16 y X

以下の文について質問です。 英文"It was not be long before Arabs discovered a way to cultivate these berries." 上記英文の日本語訳"まもなくアラブ人がこれらの豆を栽培する方法を発見した。" ここで... Read More

問3について質問です。 当方、全くいい案が浮かばなかったのですが、皆さんがこのような英作文に当たったらどう対処しますか❓ 具体例としてはニホンカワウソやツシマヤマネコ、トキ、コウノトリが挙げられるようですが私はどの生き物も英語で書けません。(/ω＼*) ちなみに私はホ... Read More

次の英文を読み, 設問に答えなさい。 Jaguars had called the American Continents their home since the Ice Age when their ascendents crossed the Bering Land Bridge that once joined what is now Alaska and Russia. They lived in the central mountains of the southwestern United States for hundreds of years until they were almost driven to extinction in the mid- 20th century after hunters shot the last one in the 1960s. Currently, jaguars are found in 19 different countries. Several males have been observed in Arizona and New Mexico over the last 20 years, but breeding pairs have not been seen or reported north of Mexico. Natural reestablishment of them is also unlikely because of urbanization and the U.S.-Mexico border blocking jaguar migration routes. Now, after more than a 50-year absence, conservation scientists are suggesting the jaguar's return to their native environment in a study that outlines what the rewilding effort may look like. The authors of the new paper suggest a suitable area for jaguars spanning 2 million acres from central Arizona to New Mexico. The space would provide a big enough range for 90 to 150 jaguars, the researchers explained. They also argued that bringing jaguars back to the U.S. is crucial to species conservation as they are listed as near-threatened on the IUCN Red List, and reintroduction could also help restore native ecosystems, the Associated Press reports. "The jaguar lived in these mountains long before Americans did. If done