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数学 高校生

157.2 記述に問題ないですか??

246 基本例題157 三角関数の最大 最小 (4) ・・・t=sin+cos0 ①①00 関数 f(0) = sin20+2(sin0+ cos 0) - 1 を考える。 ただし, 0≦O<2πとする。 (1) t=sin0+cose とおくとき, f(0) を tの式で表せ。 (2) t のとりうる値の範囲を求めよ。 (3) f(0) の最大値と最小値を求め,そのときの0の値を求めよ。 415 指針▷ (1) t=sin+cose の両辺を2乗すると, 2sin cos 0 が現れる。 解答 (1) t = sin0+cose の両辺を2乗すると (2) sin+cose の最大値 最小値を求めるのと同じ。 (3)(1) の結果から,t の2次関数の最大・最小問題 (t の範囲に注意) となる。よって、 本例題141 と同様に 2次式は基本形に直すに従って処理する。 0 ゆえに したがって t2=sin20+2sin Acos0+cos20 t2=1+sin20 よって f(0)=t2-1+2t-1=t+2t-2 (2) t=sin0+cos0=√/2sin (0+4) ① 9 00 <2のとき,40+1 したがって -15sin(0+)≤15 -√2 ≤t≤√2 (3) (1) から f(0)=t2+2t-2=(t+1)²-3 -√2≦t≦√2の範囲において, f(0) は t=√2で最大値 2√2, t=-1で最小値-3 をとる。 t=√2 のとき, ① から sin (0+4)=1 =1& 76ain ②の範囲で解くと t=-1のとき, ① から ② の範囲で解くと よって π 0+ T π...... ・・・・・ ② であるから π 4 2 0+ sin20=t2-1 π 5 4 4 Leben feue EN 0=7のとき最大値2√2; π, 1 sin (0+4)=-(+)nie √2 $2 すなわち匹 0=1 4 ; 0= π, 3 7 - すなわち0=π, 4 【sin²0+cos20=1 YA O 基本13 14 【類 秋田 ② : 合成後の変域に注意。 3 π 2 のとき最小値-3 √2 f(0) 2√2-1 -1 1 iO 最小 -3 1

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英語 高校生

解いたのがあっているか教えてください。

第 01 章 15 13 Michelle loves her dog, and ( ① washes Try! My father usually ( ② washed ① woke ② wakes 12 1 Section 1 現在時制 過去時制 ・進行形 ・時制の問題のポイント 動詞を入れる問題では, 時を表す語句を探す。 文意や空所の前後の語句に注目し, 空所の品詞や形を判断する。 Nick ( ① leaves Field 1 文法 2. The game ( ① starts My brother ( 1 watches ③ is watched Try! Maria ( COMPLEME Try! 1.Scott (move) the chair to our classroom last Monday. 時制 2. Everyone ( 1 is known ③ is washing ) up at 5 o'clock these days. LANTL 3 wake ② has started ) home about two hours ago. (le ② is leaving ③ left ④ has left ) the dog every Sunday. ④ wash an hour ago. 1 was talking ③ has been talking ④ woken PSACCH ② is watching 4 is being watched ③ will start E AS Try! Keiko is in the kitchen. She's () a pot of tea. ① is making > 2 making 3 makes 4 make SLADI When I entered the room, David (5) TV. ① has been watching ② is watching 3 was watching ④ watches ④ started ) TV in the living room at the moment. ② is knowing ) with Jan when I saw her 30 minutes ago. ② has talked ④ is talking 合 章 30 AR TO ) about his success in business. i 3 know ④ knows J&J 語形変化 She ( ) that doll very much. 80 ① like ② likes ③ was liking ④ has been liking Try! 1. I hated chemistry when I was in junior high school, but now I (like) it. (神田外語大) 現在の習慣的動作 ・ 状態を表す動詞の形 は? JOSEHONE4 (東京工芸大 主語が Michelle であ ることと every Sunday に注目 T100 過去の動作・状 態を表す動詞の形 は? about two hours ago 「約2時間前に」が示す ,現在,過去,未 来のどれ? ( 椙山女学園大 ) (湘南工科大)文 T100 今している最中 の動作を表す動詞の 形は? 主語が my brother で あることと watch と at the moment の関係に 注目 T100 過去のある時点 進行中の動作を表 す動詞の形は? When I entered the room 「私がその部屋に 入ったとき」という過去 のある時点でDavid が ainenしていたことを表すに は? 10 原則として進行形にし ない動詞とは? like 「・・・ が好きである」 は進行形にできるか できないか? Sec 6 Try 17 TE F 8

解決済み 回答数: 1
英語 高校生

4番の書き直しの答え教えてください🙇‍♀️

He studied maps, made maps of his own voyages and of the voyages of others, and read books of travel. And always he said to himself: "There is an ocean east of China and an ocean west of Europe. Well, if the earth is round, it must be the same ocean that reaches from Europe around to China and laps the shores of both. And anyone can see that the earth is round if he watches how a ship sails out of sight on a clear day. Its hull disappears first, then the sails, till at last the very tip of the mast drops out of sight over the curve of the sea. If I could sail westward far enough, I know I should reach the eastern lands, and the great prob- lem would be solved." But Columbus had no way of proving his belief that he could get to the East by sailing (©). He was a poor man, and he had no money of his own with which he could buy ships, pay for supplies, and hire sailors to prove his kings and queens were rich () and powerful () in the belief. Only days to *fur- nish what he needed. For many long years (toto / helend / get / tried him/ships and sailors / one or another of the kings of Europe) with which to make the voyage. Of the great countries only France remained, and Columbus determined to go there. If the king of France failed him, no hope was left. *hull : 「船体」 *furnish: 「~を提供する」 C ships 1) 文中の空所ⓢⓔ (2ヵ所ある)に適語を1話ずつ補え, (各3) 2) 下線部の不定詞に用法の点で最も近い不定詞を含む文を次から1つ選び, 記号で答え £. (3) a b Cin It is difficult to finish it within a week. She was happy to receive. a love letter. You must work hard to master math. d She must be mad to say such a thing. 3) カッコ ⓘ が 「彼はヨーロッパの国王に誰かれとなく船と船員を貸してもらおうと努めま した」 という意味を表すように、 カッコ内の語句を並べ換えよ。 (6) 4) 下線部 ⑧ とほぼ同意になるように、次の書き出しに続けて英文を完成させよ。 (4) Columbus determined that ... 5) 本文の内容と一致するように,次の空所に適切な語を1話ずつ補え。 (各3) 7 Geography was among Columbus's ( ) studies. ). At the age of fourteen, Columbus became a ( The king of France was the (1) hope of Columbus. ( 12:10) を和訳せよ。 6) 下線部 how de P jole sicut to stay at badan dan undhe as.

未解決 回答数: 1