Posted by Amanda and Travis on Sunday, September 23, 2012 at 9:19pm.
range is v^2 sin(2θ)/g
height is v^2 sin^2(θ)/2g
so,
sin(2θ) = sin^2(θ)/2
2sinθcosθ = sin^2(θ)/2
4cosθ = sinθ
16cos^2(θ) = sin^2(θ) = 1 - cos^2(θ)
17cos^2(θ) = 1
cosθ = 1/√17
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