jika f (×)= 4 cos ( 2×+50'),tentukan nilai f(65').
Matematika
komandokopassus
Pertanyaan
jika f (×)= 4 cos ( 2×+50'),tentukan nilai f(65').
1 Jawaban
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1. Jawaban Anonyme
Bab Trigonometri
Matematika SMA Kelas XI
f(x) = 4 . cos (2x + 50°)
f(65°) = 4 . cos (2 . 65° + 50°)
f(65°) = 4 . cos (130° + 50°)
f(65°) = 4 . cos 180°
f(65°) = 4 . (-1)
f(65°) = -4