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दो सदिश vec(A) तथा vec(B) परस्पर लम्बवत्...

दो सदिश `vec(A)` तथा `vec(B)` परस्पर लम्बवत् होंगे यदि

A

` vec(A) + vec(B) = 0 `

B

` vec(A) - vec(B) = 0 `

C

` vec(A) + vec(B) = 0 `

D

` vec(A) * vec(B) = 0 `

लिखित उत्तर

Verified by Experts

The correct Answer is:
D
`vec(A) * vec(B) = AB cos theta = 0 `
`:. cos theta = 0^(@)`
या `theta = pi// 2 `
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