It is given that a=4i−3j\mathbf{a} = 4\mathbf{i} - 3\mathbf{j}a=4i−3j.
Find ∣a∣|\mathbf{a}|∣a∣.
Find the angle that a\mathbf{a}a makes with the positive xxx-direction, giving your answer to 1 decimal place.