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Verified answer
Verified answer
Dalam soal tidak diketahui apakah 4/5 itu sin α atau cos α ??Jika sin α = 4/5 maka cos α = 3/5
Sin 2α = 2 sin α cos α = 2 . 4/5 . 3/5 = 24/25
Jika cos α = 4/5 maka sin α = 3/5
Sin 2α = 2 sin α cos α = 2 . 3/5 . 4/5 = 24/25