Mathematics
Senior High
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236教えてください!

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✨ Best Answer ✨

θの動径が第四象限→sinθ<0、cosθ>0
あとは三角関数の相互関係の式を使って溶けるはずです!!
(1+tan²θ=1/cos²θ など)

なーちゃん

ありがとうございます‼︎😸

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