Mathematics
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2行目から3行目の変換を教えて下さい🙏

fre)= 2sin'0 -2J3sin@coset¥ cos'0 2c05O -2JBSin Ocoso t 2 CoS28--J38inz@.+3 ニ ニ

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✨ Best Answer ✨

以下の2倍角の公式を用いています。

sin2θ = 2sinθcosθ
cos2θ = 2cos²θ-1

ゆな

ありがとうございます🙇

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