长5M的梯子MN以倾斜角62°架在墙上,若梯子的顶端M下滑一定距离后,底端N向左滑动0.65M,(剩余题目在下)
长5M的梯子MN以倾斜角62°架在墙上,若梯子的顶端M下滑一定距离后,底端N向左滑动0.65M,(剩余题目在下)
顶端M下滑了多长距离(精确到0.01M)?
顶端M下滑了多长距离(精确到0.01M)?
数学人气:984 ℃时间:2019-08-28 05:55:41
优质解答
cos(62°) = 0.46947156278589 ≈ 0.47∵mn=5m ∴滑之前底端距离墙的距离L1=5*cos(62°) =2.35根据勾股定理滑之前顶端距离地面的距离L2=√(5^2-2.35^2) = 4.4133320745215 ≈ 4.41∴滑之后底端距离墙的距离L3=L1+0.6...
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