這是原文書的題目內容
1.normlize the vector 40i^ + 10j^ – 25k^
A:(0.83 0.21
-25) B:(40 10 -0.52)
C:(4 1 -2.5) D:(0.45 0.72
-0.18)
1.normlize the vector 40i^ + 10j^ – 25k^
A:(0.83 0.21
-25) B:(40 10 -0.52)
C:(4 1 -2.5) D:(0.45 0.72
-0.18)
2.calculate the following dot product(25 0 -15) * (-1 23
4)
A:(-25 0 -60) B:(24 23 -11)
C: -85 D: 36
3.calculate the
following cross product(25 0 -15) * (-1 23 4)
A:-85 B:36 C:(-25 0
-60) D:(345 -85 575)
4.calculate the angle berween the vcctors(25 0
-15) and (-1 23 4)
A: -15度 B: 36度 C: 60度 D: 97度
