A pilot direct his plane north and the plane's velocity in still air is 245km/hr. If there is a strong wind of 105km/hr blowing west, what is the ground velocity of the plane?

Answer 1

v=sqrt{(pl)²+v(wind)²} = ...
α= arctan{ w(pl)/v(wind)}=...
north of west

Answer 2

What does sqr and arctan means

Answer 3

sqrt =square root,

arctan = tan⁻¹
- inverse trigonometric function –