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Given that a.b=0 and axxb=0. What can yo...

Given that a.b=0 and `axxb=0`. What can you conclude about the vectors a and b?

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Given that `a.b=0`
Then , either `|a|=0 or |b|=0 or a bot b` (in case a and b are non -zero) and if `axxb=0` then either `|a|=0 or |b|=0 or a||b` (in case a and b are non - zero) But a and b cannot be perpendicular and parallel simulataneously.
Hence, `|a|=0 or |b|=0`.
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