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cos 2x sin x
Pakai rumus perkalian diubah ke penjumlahan/pengurangan
1/2 sin 3x - 1/2 sin x
Kamu integralin
-1/6 cos 3x + 1/2 cos x
Kamu masukan batas nya
Maksudnya p/2 itu phi/2 kali ya = 90 derajat
Masukin batasnya hasilnya
={-1/6(0) + 1/2(0)} - {-1/6(1) + 1/2(1)}
= 0 - (-1/6 + 1/2)
= 0 - 1/3
=-1/3 B