已知=-4+j3,=2.78+j9.20,用计算器计算=( )。/ananas/latex/p/1787/ananas/latex/p/1786https://mooc1-1.chaoxing.com/ananas/latex/p/1787/ananas/latex/p/638451
举一反三
- 设,在D上可积,,则 , , .https://mooc1-1.chaoxing.com/ananas/latex/p/27236https://mooc1-1.chaoxing.com/ananas/latex/p/356004https://mooc1-1.chaoxing.com/ananas/latex/p/1153863https://mooc1-1.chaoxing.com/ananas/latex/p/1153883https://mooc1-1.chaoxing.com/ananas/latex/p/1153941https://mooc1-1.chaoxing.com/ananas/latex/p/1153969https://mooc1-1.chaoxing.com/ananas/latex/p/1153978
- 图中,=15kN,=25kN,此二力在x,y轴上的投影为: = __________ kN;= ___________ kN; = ___________ kN; = ___________ _ kN。 图中,二力对O点的矩分别为:= ____________ kN·m;= ____________ _ kN·m。 /ananas/latex/p/1787/ananas/latex/p/1786/ananas/latex/p/643759/ananas/latex/p/643760/ananas/latex/p/643761/ananas/latex/p/643762/ananas/latex/p/643767/ananas/latex/p/643768329c960ada8625065d8e04c65847a58a.png
- 图示等边三角形板沿三边分别作用三个大小相等的力、、,则该板将()。/ananas/latex/p/1787/ananas/latex/p/1786/ananas/latex/p/116395c6981d5dcb7b3a932d7fcd2ae1f15b9.jpg
- 已知()=0.4,则()=( )/ananas/latex/p/152/ananas/latex/p/278/ananas/latex/p/847/ananas/latex/p/281/ananas/latex/p/152/ananas/latex/p/4781/ananas/latex/p/7419/ananas/latex/p/6547
- 已知椭圆的方程为,椭圆上一点P到一个焦点的距离为8,则点P到另一个焦点的距离为( )。/ananas/latex/p/462376/ananas/latex/p/1787/ananas/latex/p/1786