Mathematics
Senior High
(1)と(2)を教えてください🙏🏻
除33| 右の図のょうに.
AB=3, AD=2, AEニ1
である直方体 ABCD 一EFGH がある<
(1) cos BED の値を求めよ。
(2) へBED の面積 S を求めよ。
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