Which of the following statement is true?

Options

A. When the coordinate axes are translated the component of a vector in a plane changes.
B. When the coordinate axes are rotated through some angle components of the vector change but the vector's magnitude remains constant.
C. Sum of `vec(a) and vec (b) "is" " " vec( R )`. If the magnitude of `vec(a)` alone is increased, angle between `vec(b) and vec( R )` decreases.
D. The cross product of `3hat(i) and 4 hat(j)` is 12.

Answer

B