Question 1205348
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A ship is 130 m away from the centre of a barrier that measures 180 m from end to end. 
What is the minimum angle that the boat must be turned to avoid hitting the barrier?
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The barrier is a circular shape.


The minimum angle is defined by the tangent line to the barrier.


The angle is  sin(a) = {{{90/130}}} = {{{9/13}}} = 0.69231


a = arcsin(0.69231) = 0.7647 radians, or 43.9 degrees (approximately).    <U>ANSWER</U>
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Solved.