Matematika

Pertanyaan

Cos x:1+sin x + 1+ sin x :cosx

1 Jawaban

  • cosx/(1+sin x) + (1+sin x)/cos x
    = {cos x(cos x) + (1+sin x)(1+sin x)} / cos x(1+sin x)
    = {cos²x + 1 + 2sin x + sin²x} / cos x(1 + sin x)
    = {cos²x + sin²x + 1 + 2sin x} / cos x(1+sin x)
    = {1 + 1 + 2sin x} / cos x(1 + sin x)
    = (2 + 2sin x) / cos x(1 + sin x)
    = 2(1 + sin x) / cos x(1 + sin x)
    = 2 / cos x
    = 2 sec x

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