Jhuynh94521 Jhuynh94521
  • 10-04-2024
  • Mathematics
contestada

If cos⁻¹[cosα+cosβ / 1+cosα cosβ]=2Tan⁻¹x then x=
A. tan α/2 tan β/2
B. tan α tan β
C. cot α/2 cot β/2
D. cot α cot β

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