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A port and a radar station are 2 mi apart on a straight shore running east...

A port and a radar station are 2 mi apart on a straight shore running east and west. A ship leaves the port at noon traveling at a rate of 13 ​mi/hr. If the ship maintains its speed and​ course, what is the rate of change of the tracking angle theta θ between the shore and the line between the radar station and the ship at​ 12:30 PM?​ (Hint: Use the law of​ sines.)

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