和積の公式に関しての問題です。 最後の２行が分かりません。0≦5θ/2≦5π/4なら 5θ/2は0とπになるのでしょうか？ 解説お願いします🙇‍♂️

、e_n Adas ania COS キ0 5 50 -3D0 よって, sin (解 2 (-)20 50 -=0, π リ= 5元 0sい -0, 50 4 だから、 200 2ミ リ= 正方 2元 . 0=0, 5 それ 参考 (2倍角,3倍角の公式を使うと α, E

8番の日本語訳を教えてください🙇‍♂️

ES ーー 人 )ュデ bab 8. When I told my friends what( ) place at school the other day, they were really shocked. ① js taking ② has taken ③ had taken ⑨④ takes 9. Tadashi( )inTurkey for three years, when the earthquake happened.

なぜlivingで進行形になっているのですか？

右 ①(m the summer of 1999), Andrew Sharpe didmt know [where ~ his next meal was coming from ]. ⑧The 48-year-old Quebec native に below the jB9XemtI level in Vancouver's Downtown Eastside, an inner-city neighborhood [hat is in Canadas poorest 「スラム化した」 section。 (at the center of the city's most dangerous area)]. ⑧③A high-school dropout,、 Sharpe struggled survive (on $500 a $ 「月500ドルの金で」 mnonth). ④He lined up at food banks, Ned6aee churches and のおま本 ター VAS通5守 NRhDPTYP libraries (in order to heal his spirit) |and| attended counseling [to にーー y 硬的用法 cure his alcohol problems]. ⑤ Then he saw a poster on a telephone pole.⑥“ |” it promised. ⑦He signed up immediately.

ここからここ→にするやり方教えてください。

でで 公式などを利用して変形し。 9 ァっ0 の上 の= 920 中1_cos ,. (1一cos MI届C08bOU語計量にCO ] ーーーーーーーーーーーー = = ーーーーー ーーー ーー ーー 0 30 ア 6@| 十 cos ヶ) MM (1 十cos ) 明 SI こう 巡r 光一 7 隊加2とおくと、ァっヶ のと き | / OGKLADAS2N > シービビーヽアン e リノ NY

問7ってなぜイになるか教えてください。解説見ても、mean little to ｢～にとってはほとんど意味が無い。｣としか書かれてなくて、困ってます！見にくかったら言ってください。

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合っていますか？？

各文の( )に入る最も適切な語句を選び, 番号を答えなさい。 Q)【( ) Andrew for more than twenty YearS nOW ① amknowing 。⑨② havebeen knowing ( ③ have knoW (2) By the time you get to Sendai the day after tomorrOWi I( ⑨ know ) for Hokkaido. ① am leaving @ have left ⑧ willhave already left ④ illreach (3⑬ Hfit( ) raining soon, shall We go outfor awalk? Q① stopped ⑨ stops ⑧ willstop のwould stop (⑳-When gotto the classroom the lesson ( ① already begins ② had already begun ③ has already begun iS already beginning (5) Mary js absent today,。 She ( ) to Hokkaido. ① comes @ has been ⑨Ass gone ④ has arrived (6) My sister ( ) for workanhourago.。 伏牙 6 ① leaves ② hadleft ⑧ has left ての@ je (?) We dontknow when he 、 ) back toJapan again. (香緒 ① does come (、⑨/has come ③ would come ④ will come (8) Ihave been studying this book ( ) the beginning of the year. (関本凍計 /ぐsnee @ before ③ al ④ after ⑨ The five dogs ( ) to my uncle. (源) (の? belong ② belongs are belonging ④ have been belongme ⑩1( ) for very long when a phone call from a friend woke me up. (青山病 〇① didntsleep ② havent slept ③ havent been sleeping ( been sleepng imce she left japan_。 Qt( ) 00 Ye (人葉T ⑫ 時が 72 ので MGUDaS960 届 986 るss will 人Ellhim to call y6u when he ( ) from his trip. ① mm の returne ③ returns 開 (⑨ wil 0 9 IpaHosndy aboadasS6na1( ) tsEngsnod PP Q danste のjawefnshed (⑨wiufnn の (昌 Eee ) jray421 メ wil have fnished smell ⑧ are smelling ③ are smelt ④ (沖細国 (5 4: Ts that Italian restaurant next to the bookstore new? being smet な No, Ithink ( ) for more than a year nowi (エンター届 ① is been open ⑧ its open (で⑨⑮ opened @ iwas 8 ニン Den 774 (3209時 ・条側調節での時制に注意 (の) when 節は名詞委か出

答えは②なんですが、yesterdayがあるのに完了が使えるのですか？

(8)の答えが1になる理由を教えてください！

質問ばかりすみません💦 なんでこの方程式ができるのか分かりません

答え全部あってますか？