Matematika

Pertanyaan

buktikan cot B+ tan B =cosec B sec B? penting banget plis bantu jawab

1 Jawaban

  • cot B = 1/ tan B = 1/(sin B/cos B) = cos B / sin B

    cot B + tan B = cos B/sin B + sin B / cos B = (cos^2 B + sin^2 B) / sin B cos B = 1/(sin B cos B) = (1/sin B) (1/cos B) = cosec B sec B

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