(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the angles which the vector A = 3i -6j +2k makes with the coordinate axes

3. The attempt at a solution

Let a, b, c be the angles wich A makes with the positive x,y,z axes.

A• i = (A)(i)cos(a) = 7*cos(a)

The Solution says:

A•i= (3i - 6j + 2k)• i = 3i• i -6j• i + 2k•i = 3

And I do not understand how they get 3 as the answer.

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# Homework Help: Vector, dot product

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