I need help understanding what things like m01, m02, m10 etc. Mean & what exactly the CFrame & Rotation Matrices are.
I've looked up Euler Angles in ROBLOX's Wiki, (http://wiki.roblox.com/index.php?title=Euler_angles) but do not understand the 'Resulting rotation matrix' Section & below.
All possible help would be very much appreciated. Examples & alternatives would be helpful.
Note: When I say alternatives, I mean other ways of doing it, for example another way to do .magnitude would be to calculate it using Pythagoras' Theorem.

3 comments
This is a post by AxisAngle from the RBXDev forum which I have found useful: http://i.imgur.com/yt4NHcm.png
Thank you again for giving me something that is useful and easier to understand. It wasn't too easy to get at first but all of the variables now make sense. Only thing I need to fully understand now is the dot product & quaternions.
The only issue is I don't understand what these mean? https://gyazo.com/be5470d0e913c9d3eb1b2318543a6d83 The link you provided doesn't talk about m01 sy etc.