Mathematics
Senior High
ここって普通1−cos２乗45°、ぶんの２になりませんか？
なんで２乗がないのか教えて下さい🙇
SINM2DIDNS ST 240 人邦1でCOS49
2 2
1-ツ2
AN240 ey2
=ーぉューェーー
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