If cos(75° - ψ) = sin(60° - θ), then the value of cot(θ + ψ) is (Assume that ψ and θ are both positive acute angles with ψ < 75° and θ < 60°)

If cos(75° - ψ) = sin(60° - θ), then the value of cot(θ + ψ) is

(Assume that ψ and θ are both positive acute angles with ψ < 75° and θ < 60°)
1). 1
2). √3
3). 1/√3
4). √3/2

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