Question

Todd’s friend Olivia is flying her plane at an elevation of 6.3 km. From the ground, Todd sees the plane moving directly toward him from the west at a 49° angle of elevation. Three minutes later he turns and sees the plane moving away from him to the east at a 65° angle of elevation. How fast is Olivia flying in kilometers per hour?

Answer 1

Use trig rules twice, get each distance, add for total distance, compute velocity.

Full answer in picture.