   Chapter 12.3, Problem 38E

Chapter
Section
Textbook Problem

# If a vector has direction angles α = π/4 and β = π/3, find the third direction angle γ.

To determine

To find: The third direction angle.

Explanation

Given:

α=π4 and β=π3 .

Formula:

cos2α+cos2β+cos2γ=1 (1)

Here,

α,β and γ are the direction angles.

Rearrange equation (1).

cos2γ=1cos2αcos2β

Substitute π4 for α and π3 for β

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