A Jet Heads in the Direction N $30 ^ { \circ }$

question 84

Essay

A jet heads in the direction N $30 ^ { \circ }$
E at a speed of $400$
mi/h. If the jet experiences a $20$
mi/h crosswind flowing due east, find (a) the true velocity $\boldsymbol { Y r } ^ { \mathrm { r } }$
of the jet
b) the true speed of the jet
c) the direction of the jet.