SOLUTION: Given the following vectors:
c = i - 2j
d = 5i - 3j + 2k
Find c(dot)c x d. My answer is 0 but the provided solution is 2.
My working:
As the cross product is between t
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-> SOLUTION: Given the following vectors:
c = i - 2j
d = 5i - 3j + 2k
Find c(dot)c x d. My answer is 0 but the provided solution is 2.
My working:
As the cross product is between t
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Question 875097: Given the following vectors:
c = i - 2j
d = 5i - 3j + 2k
Find c(dot)c x d. My answer is 0 but the provided solution is 2.
My working:
As the cross product is between two vectors, the cross multiplication has to be done first (the dot product is scalar).
c x d = [(-2*2)-(0*-3)]i - [(1*2)-(0*5)]j + [(1*-3)-(-2*5)]k
= -4i - 2j + 7k
c(dot)c x d = (1*-4)+(-2*-2)+(0*7) = 0
Can you see a mistake in my working? Thank you in advance. Answer by jim_thompson5910(35256) (Show Source):
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