Mathematics
Senior High
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三角比の問題です
答えは2分の3です

35 次の式の値を求めよ。 (1) cos² 44°+cos² 45°+cos² 46°

Answers

✨ Best Answer ✨

cos^244°+cos^245°+cos^2(90°-44°)
=cos^244°+sin^244°+cos^245°
=1+(1/√2)^2
=1+1/2
=3/2

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ありがとうございます!

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