Question

Todd's friend Olivia is flying her stunt plane at an elevation of 6.3 km. From the ground, Todd's used to plane moving directly toward him from the West at a 49 degree angle of elevation. 3 minutes later he turns around and sees the plane at an elevation of 8.3 km moving away from him to the east at a 65 degree angle of elevation. How fast is Olivia flying in kilometers / hour

Answer 1

Can't understand the sentence where it says "From the ground, Todd's used to plane moving directly toward him from the West at a 49 degree angle of elevation". Help me interpret it.