Question

Find the speed and direction of a plane with a velocity of 〈5,-12〉.

Answer 1

Below in bold.

Explanation:

Speed = √(5^2 + (-12)^2)

= √169

= 13,

Direction = arctan (5/-12)

= -22.61 degrees ( its in the 4th quadrant)

So we can write the direction as 90 + 22.61

= 112.61 degrees.