Mathematics
Senior High
2番ですが答えの1行目√2（cos4分の7π＋ sin4分の7π）じゃダメですか？？
) a=73(訪-坊2e(-久sm(-証
Y3 5 5
= すり=をx+isinz)
よら6
ォァー272 oos (人+るz)+ism[-+す|
2 6
1且シーソ2キ27 ーー1+797 (2) ぇー1-! ーーソア3+:
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