Matematika

Pertanyaan

(tan x + cot x) . Sin x = ?

1 Jawaban

  • (tan x + cot x) . sin x
    = ((sin x/cos x) + (cos x/sin x)) . sin x
    = (sin
    ² x + cos² x)/(sin x cos x) . sin x
    = 1/(sin x cos x) . sin x
    = 1/cos x

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