Question

If a = 6 i + kj and a = 10 units, find the unit vector of a vector
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Answer 1

a=10

so

$\sqrt{ {6}^{2} + {k}^{2} } = 10$

therefore k^2 = 64

so k= 8

and we know

unit vector = given vector / magnitude of vector

and here it's given magnitud=a=10

therefore final answer

$unit \: vector = \frac{6i + 8j}{10}$