# Category:Direction Cosines

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This category contains results about **Direction Cosines**.

Definitions specific to this category can be found in Definitions/Direction Cosines.

Let $\mathbf a$ be a vector quantity embedded in a Cartesian $3$-space.

Let the angles which $\mathbf a$ makes with the $x$-axis, $y$-axis and $z$-axis be $\alpha$, $\beta$ and $\gamma$ respectively.

Then the **direction cosines** of $\mathbf a$ are $\cos \alpha$, $\cos \beta$ and $\cos \gamma$, defined individually such that:

- $\cos \alpha$ is the
**direction cosine of $\mathbf a$ with respect to the $x$-axis**

- $\cos \beta$ is the
**direction cosine of $\mathbf a$ with respect to the $y$-axis**

- $\cos \gamma$ is the
**direction cosine of $\mathbf a$ with respect to the $z$-axis**.

## Subcategories

This category has the following 2 subcategories, out of 2 total.

## Pages in category "Direction Cosines"

The following 3 pages are in this category, out of 3 total.