Define Rectangular components of vector

Q. The rectangular components of a vector are $(2,2).$ The corresponding rectangular components of another vector are $(1,\sqrt{3}).$ Find the angle between the two vectors.

Q. The rectangular components of a vector are $(2,2)$. The corresponding rectangular components of another vector are $(1,\sqrt{3})$. Find the angle (in degree) between the two vectors.

Q. The rectangular components of a vector are $(2,2)$. The corresponding rectangular components of another vector are $(1,\sqrt{3})$ . Find the angle between the two vectors (in degree).

Q. What is the maximum number of rectangular components into which a vector can be split?

Q. What is the maximum number of rectangular components into which a vector can be split in space ?