Matematika

Pertanyaan

Cos 54 cos 36/cos 18

1 Jawaban

  • cos 54 cos 36 / cos 18
    = 1/2 (cos 90 + cos 18) / cos 18
    = 1/2 (cos 90 /cos 18 + 1)
    = 1/2 (0 + 1)
    = 1/2

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