Buktikan Sin (phi per 2 - alfa) = cos alfa
Matematika
CasandraMooy25
Pertanyaan
Buktikan
Sin (phi per 2 - alfa) = cos alfa
Sin (phi per 2 - alfa) = cos alfa
1 Jawaban
-
1. Jawaban ahreumlim
Sin(π/2 - α)
= sin(π/2) . cos(α) - cos(π/2) . sin(α)
= 1 . cos(α) - 0 . sin(α)
= cos(α) (terbukti)