この2問の回答の導き出し方がわかりません。 1問目は 過去形だろうなと、2を削除、 あとから調べればsoの倒置が起こっているとわかりますが、1番がなぜ不正解に当たるのか分かりません 2問目は、1か4かまではわかりましたがそこからの区別が分かりません。。どなたか教えて下さい。！

〔II〕 次の(a)~(h)の空欄に入れるのに最も適当な語(句) を 1~4の中から一つずつ選 び, その番号を記入せよ。 (a) The manager admitted ( 1. to make 2. making (b) () that Ken was able to retire at the age of 45. 1. His business was such successful 2. So successful his business is 3. Such successful was his business 4. So successful was his business 1. but for (c) There was nothing more for the father to do ( ) keep an eye on the baby boy. ) private calls on the company phone. 3. have made 4. for making 2. aside (d) Mark stayed at work late ( 3. beside for ) he could complet 4. except

135.1 グラフにπ/2ずつθ軸上、y軸上に座標を書いていったのですが、解答のグラフではy軸上の座標は1,-1だけです。三角関数のグラフを書くときはy軸の座標は最大値と最小値だけでいいのでしょうか？？

214 0000 基本例題 135 三角関数のグラフ (1) y=sin0のグラフをもとに、 次の関数のグラフをかけ。 また, その周期をいえ (3)_y=sin- (1) y=sin(0-7) 川 (2)y=1/12sine 1991 指針▷ 三角関数のグラフでは, y=sine, y=cos0, y=tan0のグラフが基本。 (1)y=sin(0-p)+α → y=sin0のグラフを 0 軸方向にか,y 軸方向に だけ平行移動 (数学Ⅰで学習) (2)y=asin0→y=sin0のグラフを軸方向に α倍に拡大・縮小 (a>0) (3) y=sink0 → 0軸方向に1倍に拡大・縮小 倍ではない! (k>0) 最大,最小となる点,0軸との交点をいくつかとって,これらを結ぶ方法も考えられる。 これは, グラフの点検としても有効である。 解答 (1) y=sin(0-- トール)のグラフは,y=sin0 のグラ フを軸方向に TC 右の図の実線部分。 周期は 2 だけ平行移動したもので, (2) y= - 12 sine のグラフは,y=sinQのグラフを y軸方向に倍に縮小したもので, 右の図の実線部分。 周期は 2 (3) yasin 1/27 のグラフは, y = sind のグラフを軸方向 に2倍に拡大したもので, 右の図の実線部分。 周期は2 1 2 p.213 解説参照。 = 4T yA 練習 135 (1) y=cos(0+3) +) 元 2 π 2 1 yA 2 0軸方向に2倍 次の関数のグラフをかけ。 また, その周期を求めよ。 (2)y=sin0+2 (3) YA 1 10 -1800 XI 2π 2π 10 π 2 y=2 t -5-2 T 1240 2 軸方向にだけ平行移動 4 ππ 2 π 0 2 p.212 基本事項 3π 軸方向に1/23倍 3 nia 2 57 テル 2π 12 4π Foto A 基本 関数y 指針▷基 y [CHAI 解答 よって, 二 2 グラブ をとっ 136

133. xを求めてからの解答までの導き方はこれでも大丈夫ですかね？？

208 重要 例題 133 解が三角関数で表される2次方程式 -8.201+00 aを正の定数とし,0を0≧0≦を満たす角とする。2次方程式 2x²-2(2a-1)x-a=0の2つの解が sine, cos 0 であるとき, a, Sin, Cos 040 nie 020000 値をそれぞれ求めよ。 指針 2次方程式の解が2つ与えられているから, 解を代入の方針でなく 解と係数の関 係 を利用するとよい。 解と係数の関係から 解答 与えられた2次方程式に対し, 解と係数の関係から sin0+cos0=2a-1 ①, 練習 a 2 sin Acos0=- ① の両辺を2乗して sin²0+2sinocoso+cos20=(2a-1) 2 E&SHO sin²0+ cos20=1 であるから 1+2sinAcos0=(2a-1)2 これを解いて a sin+cos0=2a-1, sincos =) ( 200 TO BE しかし,未知数は3つ (a, sine, cos e) であるから, 式が1つ足りない。 そこで,かくれた条件sin²0+cos'0=1 も使って, a についての2次方程式を導き, そ を解く。 なお, sin0 または cose の範囲に要注意! (Coisc 200+ C²# AB これに ② を代入して -2.(-2)=4a² =4a²-4a+1 よって 4a²-3a=0 すなわち α(4a-3)=0 pos/3 a>0であるから a=² 4 このとき, 与えられた2次方程式は 2x2-x- -=0 すなわち 3 4 1+2･ cos+1+√7 x= 4 (2) また 0≦O≦xのとき, sin0≧0であるから sin0= -01-√7 <0<===>> 1+√7 8x2-4x-3=0 0805 S 解と係数の関係・ 2次方程式 ax²+bx+c=0の20 解を α, βとすると 2015 (8800 nia a+B==₁ aß= 1+√7 cos8=1-√7 4 21008305 30nia TAH sino+coso 0000 0 2000 ie$+0 nie =0 2000 miest 065070200 00 -2(2a-1) == 「複雑な方 2 を変更 E [□] 133(cosA>sin0,0 <6<²) で表されるとき,の値と sing ponia-0°niz) (0 200+aiz)=600+0'nia EVO (1 基本 sin' + ens' =1. 0 2000 mie 3130 右の大がかれた。 x= 8x²-2-2x-3=0 であるから 0 2±2√7 8 = 1+√7 4 2±√(-2)^2+8.3 8 2014 (17 SCOVER kは定数とする。 2次方程式 25x2-35x+4k=0の2つの解が in cos 082 ③83 084 085 HI

こういうちょっと違う筋の問題はどうすれば初見で解けますか？あとなぜACはsinではなくtanですか？

保法 a 2) 0 157 円周率π に関する不等式の証明 円周率に関して,次の不等式が成り立つことを証明せよ。 ただし, は使用しないこととする。 r=3.14...... 3√6-3√2<x<24-12√3 mm Je 各辺の差を考える方法では証明できそうにない。 そこで, 各辺に同じ数を掛けたり 各辺を同じ数で割ることを考えてみる。 0 点0 を中心とする半径1の円において, 中心角が- の扇形OAB を考える。 点Aにおける円の接線と直線 OB の交点をCとすると, 面積について ゆえに 各辺を12で割ると は p.243 基本 例題150 (1)で求めた sin 15° の値であることをヒントに, 下の解答のような、中心角 の扇形に注目した図形の面積比較が浮上する。 12 よって ここで ゆえに √6-√² <12<2-√3 4 tan △OAB <扇形 OAB < △OAC π π 1/12.1.sin/11/12/11/11/12・1・tan 1/12 π sin <12<tan 12 12 sin 72=sin(4-4) UNT 12=tan(-4)= √6-√2 4 π 12 π = sin π 4 COS tan-7- -tan tan- 4 ここで, π 6 π [ 1 + tan Stan 加法定理 π 6 π π 12 = -cossin 1 √√6-√2 4 T 1+1.- 46 [大分大] π √√3 ・基本 150 = 「扇形の面積がを含む数 になることも、面積比較の 方法が有効な理由の1つ。 C tan √6-√2 4 253 12 ・<2-√3 すなわち 3√6-3√2<x<24-12√3 la 3.1063.215 √3-1-2-√3 √3+1 (0) 180 求めにくい値を不等式を使って評価する 値が具体的に求められないもの(Pとする)については、上の解答のように,不等式 ●<P<■を作ることができれば、おおよその値を調べられる。このような不等式を作っ て考える方法は,数学における重要な手法の1つである。 特に, 数学Ⅲではよく使われる。 <Cを直角とする直角三角形 ABCに対して, ∠Aの二等分線と線分BCの交点を _Dとする。 また, AD = 5, DC = 3, CA=4であるとき, ∠A=0とおく。 (1) sineの値を求めよ + Flas 4章 4 25 加法定理の応用

解説お願いします😿😿

discovered resembled called Sealand. establishing rights faced status Many people change countries during their life, but one man has (1) (2) by Roy's grief the rest of son and (10) heir took over in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, one of the platforms and announced he had started his own country, This surprised people in the UK, who believed they had the (5) . Bates and (6) to leave the platform. However, Roy (8)_ himself by his own country. During World War II, the UK built a number of artificial platforms made a name for weapons to the platform. orders In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. the people on the island (his family), (7) 6 15

教えて下さると嬉しいです( •̥-•̥ )

A. Circle the correct answer for each question. likely to be jealous of someone. 1. You are more 2. Which do many people decorate at Christmas time? 3. Which are people more accustomed to? a. rich a. a feast b. a tree a. spending money b. receiving awards a. an empire b. a rifle a. an insect b. water a. help it b. ruin it 6. What would profit do for a business? a. excited b. confused 7. Which would people rather be? a. a contract b. a feast 8. Which would you invite friends to share with you? a. a recruit b. a contract 9. Which would you sign? a. being punished b. getting a reward 10. Which would few people enjoy? B. Complete the paragraph with items from the box. Two items are extra. Which of these is a weapon? 4. 5. Which of these flows? discovered resembled establishing rights faced status by Roy's s grief the rest of Many people change countries during their life, but one man has (1) (2) son and (10) heir took over This surprised people in the UK, who believed they had the (5) . Bates and (6) to leave the platform. However, Roy (8). in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, one of the platforms and announced he had started his own country, (4) called Sealand. b. poor himself by his own country. During World War II, the UK built a number of artificial platforms made a name for weapons the people on the island (his family), (7) In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. to the platform. orders of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. 11 15 69

この問題解答してくださると助かります。よろしくお願いします。

V. 次の 36 36 37 1 - 38 39 40 2 3 4 3 4 2 3 4 2 3 4 40 の各組の英文の中で, 下線部に間違いがあるものを,それぞれ の中から一つずつ選びなさい。 The economist mentioned the necessity of reducing taxes. He once suffered a heavy loss on the stock market. We can't hope a quick economic recovery from the global recession. I'm searching all the folders on this computer for the missing file. The substance is said to have an anti-aging effect. There is a large difference in quality between the two products. Investors have a deep interest in the growing IT company. The typhoon has caused a great damage to the Kanto region. I didn't know our schedule had canceled until you told me so. I'd be at home having dinner now if I had caught the 6:00 train. Cindy moved to Los Angeles after she had graduated from college. Ron had been with the company for five years when he decided to change jobs. Dioxin is known to cause cancer in animals. The boy is being trained to be a pro tennis player by his father. She never imagined her husband to have such a serious disease. She invited her mother to stay with her while her husband was out of town. The new tax system was criticized for being too complicated. 2 The doctor felt his leg for checking if the bone was broken. This is a popular drug used for treating high blood pressure. I envy him for having many chances to travel abroad on business.

(2)の問題です。cos（180°-θ)＝-cosθだからこの答え＝-2/3になると思ったのですが答えは2/3でした！ なぜですか？？-を付けると思ったのですが、、、 教えてくださいお願いします🙏🏻😭

●なす角 ✓ 452 sine= √5 3 VESIDHAA dot (90° < 8 <180°) のとき、次の式の値を求めよ。 3 (1) sin(180°- 0) (3) tan (180°- 0) (2) cos(180°-0) coso = 23. V 453 次の直線とx軸の正の向きとのなす角0を求めよ。 *(1) y=-x (2) -√3y = 0 vor J5 第4章 図形と

(2)cosθ≧1/2の問題です！🙌🏻🙇🏻‍♀️ これ答えが0°≦θ ≦60°なんですけど、なぜこうなるのか教えて欲しいです！ cosθが1/2より大きくなるということは60°よりも大きくなるという事だとおもったのですが違いました。 教えてくださいお願いします🙏🏻😭

7 *4500°≦e≦180° のとき,次の不等式を満たす0の値の範囲を求め よ。 √3 (1) sine<- № 2 小さいとは? 2017/12/2 (3) tan0<1 (2) cosO≧

教えて下さると嬉しいです(><)

Circle the correct answer for each question. A. likely to be jealous of someone 1. You are more 2. Which do many people decorate at Christmas time? 3. Which are people more accustomed to? 4. Which of these is a weapon? 5. Which of these flows? a. rich b. poor a. a feast b. a tree a. spending money b. receiving awards b. a rifle b. water b. ruin it b. confused b. a feast b. a contract a. a recruit a. being punished b. getting a reward B. Complete the paragraph with items from the box. Two items are extra. 6. What would profit do for a business? 7. Which would people rather be? 8. Which would you invite friends to share with you? 9. Which would you sign? 10. Which would few people enjoy? discovered resembled establishing rights faced status a. an empire a. an insect a. help it a. excited a. a contract grief the rest of (9) by Roy's son and (10) heir took over Many people change countries during their life, but one man has (1) (2) himself by his own country. During World War II, the UK built a number of artificial platforms in the sea to contain (3) that would be used to fight off invaders. After the war, the soldiers left these platforms and they were forgotten - until 1967. In that year, a British man, Roy Bates, (4) one of the platforms and announced he had started his own country, called Sealand. This surprised people in the UK, who believed they had the (5) - Bates and (6) to leave the platform. However, Roy (8). made a name for weapons to the platform. orders In 1968, a court decided that the UK had no power over Sealand. Just like other places with the that the platform was in international waters. of a country, Sealand, has its own stamps, coins, and passports. It is controlled 'Prince' Michael, and is home to a large Internet business. the people on the island (his family), (7) in 11 - 15 69