arline1
arline1
07-06-2016
Physics
contestada
what is the dot product of a= -2i - 5j and b=i -4j
Respuesta :
padawan
padawan
07-06-2016
i.i = j.j = 1
i.j = j.i = 0
(-2i - 5j)(i -4j)
= (-2i).i + (-2i).(-4j) + (-5j).i + (-5j).(-4j)
= -2 + 0 + 0 + 20 = 18
Answer Link
Nabillassm
Nabillassm
20-10-2021
Answer:
18
Explanation:
Answer Link
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