Let [itex] \vec{A} [/itex] be a vector with length [itex] |\vec{ A}| [/itex](adsbygoogle = window.adsbygoogle || []).push({});

[tex] \hat{A} \;=\; \frac{\vec{A}}{|\vec{ A}|} [/tex]

1) What is [tex] \frac{\vec{A}}{|\vec{ A}|}[/tex] If [itex]|\vec{A}| [/itex] = 0?

2) What is [tex] |\frac{\vec{A}}{|\vec{ A}|}| [/tex] If [itex]|\vec{A}| [/itex] = 0?

My answer for 1) is [itex] \hat{A}[/itex] and 2) equal to 1

Please tell me why?

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# A very simple question in vector

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