Definition:Direction Cosines/Also presented as

Direction Cosine: Also presented as
Some sources do not dwell on the actual angles themselves, but instead denote the direction cosines directly as $\alpha$, $\beta$ and $\gamma$.

While this technique results in more streamlined notation, it can result in confusion.

Some sources, given the vector $\mathbf A$, use the notation $A_x$, $A_y$ and $A_z$ for the direction cosines with respect to the $x$-axis, $y$-axis and $z$-axis respectively.