sharebear86701 sharebear86701
  • 08-03-2024
  • Mathematics
contestada

Cos⁴ π/8 + cos⁴ 3π/8 + cos⁴ 5π/8 + COS⁴ 7π/8 =
(A) 1/2
(B) 1/4
(C)3/2
(D) 3/4

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