Matematika

Pertanyaan

Tolong di buat pembuktian
Cos x = 1/sec x

1 Jawaban

  • cos x = samping/miring
    secx =miring per samping

    cosx=1/secx
    samping/miring=1/miring/samping
    samping/miring=1 kali samping/miring
    samping/miring=samping/miring
    (TERBUKTI)

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