amandaaugust6346 amandaaugust6346
  • 11-03-2024
  • Mathematics
contestada

If α = 3 sin⁻¹ 6/11 and β = 3cos⁻¹ 4/9, where the inverse trigonometric functions take only the principal values, then the correct option(s) is are
a) cos β > 0
b) cos (α + β) > 0
c) cos α < 0
d) sin β < 0

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