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✨ Jawaban Terbaik ✨

(Fsinθ)^2+(Fcosθ-F')^2
=F^2sin^2θ+F^2cos^2θ-2FF'cosθ+F'^2
=F^2(sin^2θ+cos^2θ)+F'^2-2FF'cosθ
=F^2+F'^2-2FF'cosθ (sin^2θ+cos^2θ=1)

ぴよ

助かりました!ありがとうございます!

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