2.4 Exercise 34

Vectors $\overset{\rightarrow}{A}$ and $\overset{\rightarrow}{B}$ are two orthogonal vectors in the xy-plane and they have identical magnitudes. If $\overset{\rightarrow}{A} = 3.0 \hat{i} + 4.0 \hat{j}$, find $\overset{\rightarrow}{B}$.