Answer:
A. 45 degrees
Step-by-step explanation:
A projectile travels the farthest when it is launched at an angle of 45 degrees.
The maximum range is 45 degrees, ignoring air resistance.
sin(2θ) = 1
∴ 2θ = π/2.
(2θ)/2 = (π/2)/2
θ = π/4
π/4 or 45°
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