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# Quick C4 maths question

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1. What would the vector of the z axis be? Thanks
2. (Original post by Jack_Miller)
What would the vector of the z axis be? Thanks
What are the x and y values of something on the z axis?

Or a simpler example to first think about, the x values of something on the y axis in 2D?
3. (Original post by SeanFM)
What are the x and y values of something on the z axis?

Or a simpler example to first think about, the x values of something on the y axis in 2D?
The question is, calculate the angle in degrees between (5,-1,3) and the z axis
4. (Original post by Jack_Miller)
The question is, calculate the angle in degrees between (5,-1,3) and the z axis
I think you'll find that it doesn't matter, if you take the unit vector in the z direction or (0,0,10) or (0,0, lambda) - the lambda cancels out anyway.

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