Fewpal
+1 vote
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in Mathematics by (2.8k points)
1. p=q

2. q=0

3. neither p nor q is null vector

4. p is perpendicular to q

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1 Answer

+1 vote
by (2.4k points)

(A2+B2+2ABCOSø)1/2=(A2+B2-2ABCOSø)1/2

So COSø=0

Ø=90°

Option D is correct..

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