MaxManus
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Homework Statement
Find the angles which the vector A = 3i -6j +2k makes with the coordinate axes
The Attempt at a Solution
Let a, b, c be the angles which 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.