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If a=2i+3j+alphak and b=3i-alphaj+2k, th...

If `a=2i+3j+alphak and b=3i-alphaj+2k`, then
the angle between `a+b and a-b` is equal to

A

0

B

`(pi)/(6)`

C

`(pi)/(4)`

D

`(pi)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
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