Mathematics Senior High almost 9 yearsago

数2 加法定理 この問題の矢印のところがなぜcos2θと－cos2θになるのか分かりません！ 教えて下さい🙇‍♀️🙏

Waiting for Answers Answers: 0

Mathematics Senior High almost 9 yearsago

この問題教えて下さい！！

Waiting for Answers Answers: 0

Mathematics Senior High almost 9 yearsago

この問題教えて下さい！

Waiting for Answers Answers: 0

Mathematics Senior High almost 9 yearsago

数B ベクトル この問題が理解できません！急ぎです！ 教えて下さい🙇‍♀️

Unresolved Answers: 1

Mathematics Senior High almost 9 yearsago

数B (ベクトル) この問題が全然分かりません！ 教えて下さい🙇🙏

Unresolved Answers: 1

Mathematics Senior High almost 9 yearsago

3行目からどうやって答えに行き着くのか分かりません。教えて下さい！！

Waiting for Answers Answers: 0

Mathematics Senior High almost 9 yearsago

1番と２番の答え方がなぜこうなったのかよく分かりません！ 教えて下さい🙇‍♀️…💦

Waiting for Answers Answers: 0

English Senior High almost 9 yearsago

1～3番を教えて下さい！！🙇

Waiting for Answers Answers: 0

English Senior High almost 9 yearsago

これを教えて下さい！

Unresolved Answers: 1

English Senior High almost 9 yearsago

これを教えて下さい！

Waiting for Answers Answers: 0