Matematika

Pertanyaan

sin (3π/2+alpha)=cos alpha

1 Jawaban

  • sin (3π/2 + a) = sin (π/2 - a)
    3π/2 + a = π/2 - a
    a + a = π/2 - 3π/2
    2a = -2π/2
    a = -2π/4
    a = -π/2

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