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Question: Serving at a speed of 170 km/h, a tennis player hits the ball at a height of 2.5 m and an angle theta below the horizontal. the service line is 11.9 m from the net, which 0.91 m high. What is the angle theta such that the ball crosses the net will the ball land in the service box, whose outline is 6.40 m from the net?

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