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A port and a radar station are 3 mi apart on a straight shore running east and west. A ship leaves the port at noon traveling at a rate of 15 mi/hr. If the ship maintains its speed and course, what is the rate of change of the tracking angle θ between the shore and the line between the radar station and the ship at 12:30 PM? (Use the Law of Sines)

**a**, and the distance between the port and the ship,

**s**. Evaluate any known trigonometric functions of 45° as needed. Use radians to express any other angles. (see image)

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