A and b are two vectors such that a+b=a-b. Find angle between two vectors
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Answered by
5
Answer:
Step-by-step explanation:
|a+b|2=|a−b|2
(a+b)⋅(a+b)=(a−b)⋅(a−b)
a⋅a+b⋅b+2a⋅b=a⋅a+b⋅b−2a⋅b
4a⋅b=0
a⋅b=0
so a and b are perpendicular.
the angle between them is 90
Answered by
1
Answer:
the two vectors are mutually perpendicular
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