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What is the correct answer?
4
A. ω². (r₁ r₂). (1 - cos² θ)
B. ω². (r₁ + r₂). (1 + cos² θ)
C. ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ]
D. ω². (r₁ - r₂). (1 - sin² θ)