When does vectors |a + b| = |a| + |b| hold?

1.	When does vectors \|a + b\| = \|a\| + \|b\| hold?
Answer» When the two vectors are parallel or collinear, they can be added in a scalar way because the angle between them is zero degrees,they are I the same or opposite direction. Therefore when two vectors a and b are either parallel or collinear then \|a + b\| = \|a\| + \|b\|

Answer»

When the two vectors are parallel or collinear, they can be added in a scalar way because the angle between them is zero degrees,they are I the same or opposite direction.

Therefore when two vectors a and b are either parallel or collinear then

|a + b| = |a| + |b|

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When does vectors |a + b| = |a| + |b| hold?

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