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## Homework Statement

As an aircraft approaches landing, the components of its position are given by:

x=81t y=500-27t

Velocity vector of aircraft during descent is given by:

81m/s (i hat) + -27m/s (j hat)

The value of the speed during the descent is:

85.381m/s

What angle does the velocity vector make with the horizonal?

**2. The attempt at a solution**

I tried the Law of Sines sin90/85.381=sina/-27 and sin90/85.381=sina/81 but the angles of this triangle other then 90 are not what they are looking for. What do they mean horizontal?? help!