Homework Statement
Find all values of a such that w=ai+\frac{a}{8}j is a unit vector.
Homework Equations
unit vector has length of 1. and for a vector v unit vectors would be v/magv
The Attempt at a Solution
1=magw=\sqrt (a2+(a/8)2)
1=a2+(a2/64)
64=2a2
32=a2
a=\sqrt{32}
i know...
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