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vecA and vecB are two vectors. (vec...

`vecA and vecB` are two vectors. `(vecA + vecB) xx (vecA - vecB)` can be expressed as :

A

`vecB xx vecA`

B

`2 (vecB xx vecA)`

C

`2(vecA xx vecB)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
B
`(vecA + vecB)xx(vecA - vecB) = vecA xx vecA- vecA xx vecB + vec B +vecB xx vecA-vecB xx vecB`
`" "= 0 -vecA xx vecB+vecB xx vecA - 0`
`" "= 2(vecB xx vecA)`
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