Two vectors are given by a 3 i 4 j and b 2 i 5 j calculate their dot and cross products.
Answers
Answered by
2
Dot product = - 14 and cross product = - 23k
Step-by-step explanation:
Given,
Vector a = 3i + 4j and vector b = 2i - 5j
To find, the dot and cross products = ?
∴ Dot product = A.B
= (3i)(2i) + (4j)(- 5j)
= 6 - 20 [ ∵ i·i = 1]
= - 14
Also,
Cross product = A × B
= i(0 + 0) - j(0 + 0) + k(- 15 -8)
= 0 + 0 + k( - 23)
= - 23k
∴ Dot product = - 14 and cross product = - 23k
Answered by
0
Step-by-step explanation:
Given,
dot product
cross product
=
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