Question

the sum and difference of two perpendicular vector of equal length then??

Answer 1

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(A vector + B Vector). (A vector - B vector) =0

(a²-b²=(a+b) (a-b))

(A vector) ²-( B vector) ²=0, (A.B. Vector = AB cos thita)

(A vector)²=(B vector) ²

So A vector =B vector