4️⃣教えて下さい！お願いします！

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(6)で、答えはYourselfなのですが、with yourselfだと何故ダメなのですか？

“ーー IEIIIZ TaNNPダびら, JOU COL GSK DeT what she means. If, h. er。 you ask a book a question、 you must answerit( (6) ). mthis way, a book is ( (?) ) nature or the world. When You question it。it answers you, ( (8) )

英語が苦手で答えが全然わかりません。 教えてくださいm(_ _)m

Al Fi in the blanKs with the correct form of the words below. | beat / hear / help / pul / sol | ) 】 had a dentist out a bad tooth last month. ② When T saw him, T felt my heart very fast. (⑬ The music was so loud that I could not make myself (⑰ What a dificult question! IT must get my brother me. ⑮ Isaw a boy by his mother on the train. gl] Complete the sentences with the words in brackets. ⑪ You ( by / have / should / your Script / a / checked ) native speaker. ⑫ My German was poor, but 】 (myself / make / was / to / understood / able ) on my trip. ⑬ Wajking along the hallway, 」 ( on / Cathy / heard / her / talking ) smartphone. 《⑲ (made / was / Paul / to / the classroom / clean ) for being late.

これが分かりません！ 教えてください💦

三角関数の問題です。 f(θ)=cos2θ-4acosθ(0≦θ≦π)の最小値をm(a)とおく。 y=m(a)のグラフをかけ。

三角関数の問題です。 0<α<π/2、π<β<3π/2でsinα=4/5、cosβ=-3/5。 sin(α+β)=-24/25。 cos(α-β)=-1。 この時のα-βの大きさを求めよ。

数2の問題です。 2|a|+|b|≧|2a-b|を証明せよ。また等号が成り立つのはどのような時か。