Science:Math Exam Resources/Courses/MATH152/April 2016/Question A 01/Hint 1

Recall that the projection of the vector $a$ onto the vector $b$, namely $proj_{b}a,$ is given by

$proj_{b}a={\bigg (}{\frac {a\cdot b}{|b|}}{\bigg )}{\frac {b}{|b|}}={\bigg (}{\frac {a\cdot b}{|b|^{2}}}{\bigg )}b.$