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  5. 1行目の4sin....の式が、2行目の4...
Mathematics
Undergraduate
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ゆず
ゆず

1行目の4sin....の式が、2行目の4•1/2...の式になる理由が分かりません

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✨ Best Answer ✨

fine
fine

2倍角の公式を使っています。

ゆず
ゆず

有難うございます！！！

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