sin (3π/2+alpha)=cos alpha
Matematika
Rama751
Pertanyaan
sin (3π/2+alpha)=cos alpha
1 Jawaban
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1. Jawaban SadonoSukirno
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