Two adjacent sides of a parallelogram are 2î - 4ĵ + 5k̂ and î - – McqOptions

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1.	Two adjacent sides of a parallelogram are 2î - 4ĵ + 5k̂ and î - 2ĵ - 3k̂. What is the magnitude of dot product of vectors which represent its diagonals?
A.	21
B.	25
C.	31
D.	36
Answer» D. 36

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