Matematika

Pertanyaan

1) Tan 2X = 3 tan X

1 Jawaban

  • tan2x = 3.tanx
    2tanx/(1-tan^2 x) = 3.tan x
    2/(1-tan^2 x) = 3
    (1-tan^2 x) = 2/3
    1- 2/3 = tan^2 x
    1/3 = tan^2 x
    tan x = +/- 1/3 akar 3
    x = 30°, 150°, 330°

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