NerdySansX4348 NerdySansX4348
  • 09-01-2024
  • Mathematics
contestada

If cos⁻¹α+cos⁻¹β+cos⁻¹γ=3π, then α(β+γ)+β(γ+α)+γ(α+β) equal to
A. 0
B. 1
C. 6
D. 12

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