A vector has magnitude and its direction cosines are in the ratio

MATHEMATICS · Subjective · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

A vector

\mathbf{a}

has magnitude

7

and its direction cosines are in the ratio

3:4:12

. Determine the component form of

\mathbf{a}