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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class12  >>  Vector Algebra
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If $\overrightarrow a$ is a non zero vector with magnitude $a$ and $\lambda a$ is a non zero scalar then $\lambda\overrightarrow a$ is a unit vector if $\lambda=?$

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Given $|\lambda \overrightarrow a|=1$
$\Rightarrow\:|\lambda|.|\overrightarrow a|=1$
$or\:\:\lambda=\pm \large\frac{1}{a}$
answered Oct 28, 2013 by rvidyagovindarajan_1

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