# Direction Cosines of a Vector Formula – Scalars and Vectors

## Direction Cosines of a Vector Formula – Scalars and Vectors

We are giving a detailed and clear sheet on all Physics Notes that are very useful to understand the Basic Physics Concepts.

Direction Cosines of a Vector:
If any vector A subtend angles α, β and γ with X-axis, Y-axis and Z-axis respectively and its components along these axes are Ax, Ay and Az, then

cos α = $$\frac{A_{x}}{A}$$
cos β = $$\frac{A_{y}}{A}$$
cos γ = $$\frac{A_{z}}{A}$$
Then, cos² α + cos² β + cos² γ = 1

Scalars and Vectors Topics: