- #1

MaxManus

- 277

- 1

## 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.