向量運算(English)

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)

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

原連結

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