角度がπを使ったの形での場合半角の公式を使ってどうやって求められますか？解説お願いします🙏

461 半角の公式を用いて, 次の値を求めよ。 (1) sin π 12 5 *(2) cos π 8 (3) tan- 38 8π 第4章

加法定理の利用の問題で(1)(2)どちらも分からないので分かりやすく解説お願いしたいです😭🙏🏻‎

★★ 660≦x<2π のとき, 方程式 cos2x+2sinx-a= 0 が次の条件 を満たすように, 定数 αの値の範囲を定めよ。 (1) 解をもつ (2) 異なる4個の解をもつ ・3

α‬が鋭角、βが鈍角という条件が書かれている場合、普通の加法定理を使う上での違いがわからないので教えて頂きたいです。やり方丁寧に解説していただけると助かります😭😭😭

| 453 αは鋭角, β は鈍角とする。 次の式の値を求めよ。 sina= 1 3' 9 cosβ= -12 のとき sin(a-β), cos(a+β) 5 tang=5, tanβ=-8 のとき tan (+B), tan (a-β) ①

θの範囲に制限がない時、sinθとcosθは2nπと解答が書いてあるのに、tanθがnπになるのはなんでですか？解説お願いします😭

*4440≦02 のとき,次の方程式を解け。 また, 0 の範囲に制限 がないときはどうか。 1 (1) sin0= √2 1 1 (2) cos=- (3) tan0= 2

数2Bの加法定理の所なんですけど、ここの問題分からなくて😭😭丁寧に解説して頂きたいです😿‪

1 156 sina+cosẞ=- 2' cosa+sinẞ=*, sin(a+ß) の値を求めよ。 π α-B= α-β= のとき, (tan+1)(tanβ-1) の値を求めよ。

なぜcouldにはならないのですか？

32 you mind turning the volume down? 1 Can bad 2 Could 191193 Will (4) 4 Would 01

並び順がよく分かりません。どなたかよろしくお願いします。

You ( 1 ①impressed. (4) being )( )( )( )( 2 never (5) without 3 see ) by its beauty. (6) the lake

並び順がよく分かりません。どなたかよろしくお願いします。

We ( ( )( )( ) ( ) ( ) ( )()( ) our plan. 1 possible (4) to (2 out (5) did ③ everything (6) carry

高2R 適当ではない英文を1つ選ぶ問題 解説お願いしたいです

Music has the power to influence our emotions and mood. Listening to upbeat songs can make us feel more energetic and happy. On the other hand, many people use quiet music to help them staying focused. + Some studies suggest that learning an instrument can even boost brain power. It is truly a universal language that connects people everywhere.

以下の写真の様な問題の解き方を教えてほしいです。 問題を貼っていますが、一問ごとの解説ではなく 全体的な分け方について教えてほしいです。 お願いします。

1. I am planning (to travel / traveling) to Europe next month. 2. She is very good at tennis, so you should avoid (to play / playing) against her. 3. We managed (to catch / catching) the last train just in time. 4. I really don't mind (to wait waiting) for another thirty minutes. 5. He promised (to call / calling) me as soon as he arrived at the airport. 6. The company decided (to close / closing) its Tokyo office. 7. You should practice (to speak / speaking) English every day. 8. They offered (to help / helping) us clean up the kitchen. 9. I can't imagine (to live / living) without my smartphone. 10. He refused (to sign signing) the contract until he read it carefully. 11. She gave up (to look / looking) for her lost earring. 12. I expect (to finish / finishing) this project by Friday. 13. We ended up (to stay / staying) at a cheap hotel because of the storm. 14. They put off (to have / having) the meeting until next week. 15. He pretended (to know 16. The thief denied (to steal / stealing) the expensive watch. 17. I cannot afford (to buy buying) a new computer right now. 18. Have you finished (to wash / washing) the dishes yet? 19. She hesitates (to tell / telling) the truth to her parents. knowing) everything about the issue. 20. I enjoy (to listen / listening) to podcasts while commuting. 21. My brother suggested (to go / going) to the beach this weekend. 22. We hope (to see / seeing) you again in the near future. 23. You must keep (to try / trying) until you succeed. 24. The doctor recommended (to take / taking) a few days off. 25. He failed (to pass / passing) the driving test for the third time. 26. She dislikes (to wake waking) up early on Sundays. 27. They are preparing (to move / moving) to a new apartment. 28. I miss (to hang / hanging) out with my friends from high school. 29. He demanded (to speak / speaking) to the manager immediately. 30. Please escape (to make / making) careless mistakes on the exam.