For the curve y = 3sinθcosθ, x = eθsinθ, 0 ≤ θ ≤ π, the tangent is parallel to the x-axis when θ is:<p></p>

For the curve y = 3sinθcosθ, x = eθsinθ, 0 ≤ θ ≤ π, the tangent is parallel to the x-axis when θ is:

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