Question

if a dot product of two non zero vectors equals -1 then the vector must be ________ to each other

1. parallel [ pointing in the same direction]
2. parallel [pointing at the opposite direction ]
3. perpendicular
4. cannot be determined ​

Answer 1

Answer:

2.Parallel (pointing in opposite direction)

Step-by-step explanation:

a.b = abcos(theta)

If a.b = -1 , cos(theta) = -1

Theta = 180 degree

Hence antiparallel

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