Matematika

Pertanyaan

tan x = 1-2 cos² x : sin x cos x + cot x

1 Jawaban

  • (1 - 2 cos^2 x)/(sin x cos x) + cot x
    = (1 - 2 cos^2 x)/(sin x cos x) + (cos x)/(sin x)
    = (1 - 2 cos^2 x)/(sin x cos x) + (cos^2 x)/(sin x cos x)
    = (1 - 2 cos^2 x + cos^2 x) / (sin x cos x)
    = (1 - cos^2 x) / (sin x cos x)
    = (sin^2 x) / (sin x cos x)
    = (sin x) / (cos x)
    = tan x

    ^2 = pangkat 2

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