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# For what values of p, $\overrightarrow a = (2\hat i + 6\hat j + 3\hat k)$ p is a unit vector.

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Any unit vector in the directiln of a vector.is a vector ÷|avector| |a |vector | is √2^2+6^2+3^2=7 Hence the value of p is 1/7
answered Nov 30, 2013