要焊接一个高3.5cm,底角煨为32°人字形钢架,约需多长的钢材?要用锐角三角函数来做,
人气：495 ℃ 时间：2020-03-28 00:51:14
解答
人字钢架的斜边=2*3.5/sin32°=13.2；底边=2*3.5/tg32°=11.2,总长24.4cm
推荐
猜你喜欢
- you can tell that lisa really wanted to win ,though解释下
- 为什么日本字和中国字很像?
- 几个小朋友排队列,每列站8人还差7人,每列站7人多出8人,有多少个小朋友来排队列?
- 求教一道数学题,
- 人类为了测量地球到月球之间的距离,向放在月球上的装置发射激光,经过2,56S,在地面上接收到返回的激光信号,那么可以测得地球和月球之间的距离为_____m
- 1+111等于几
- Are not only you but also he going to Beijing?
- You are with agroup of students and have found two tickets.what do you ask the group?
