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Suppose I shot an arrow into the air at some angle from the horizontal with an...

Suppose I shot an arrow into the air at some angle from the horizontal with an initial velocity of 66.0 m/s. I want the arrow to hit the ground exactly 360 m from the launch. Calculate the necessary launch angle. Assume that the local acceleration due to gravity is 9.80 m/s/s and that the ground is flat. Neglect air resistance.
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