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加法定理の逆をやればもう少し見た目が綺麗になるかと
25であれば、cos(α+β)、sin(α+β)
26ならcos(α-β)、-sin(α-β)

Clearnote User

なるほど!確かにその方が綺麗ですよね!ありがとうございました!

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