Pre-Calculus, 9th edition

 PAGE: 609 SET: Exercises PROBLEM: 7
Please look in your text book for this problem Statement

a)

The vectors are and .

Dot product definition:

.

(b)

Find the angle between and .

Cosine of the angle between two vectors: .

Find magnitude of vector : .

.

.

Find magnitude of vector : .

.

.

Apply formula: .

.

.

.

.

c)

Dot product of the vectors , so the vectors are orthogonal.

The vectors are orthogonal.

a) .

b) The angle .

c) The vectors are orthogonal.

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