integral dari 5 tangen x dx = ..?
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= ∫ 5 ((sin(x)/cos(x)) dx
Misal:
cos(x) = u
-sin(x) dx = du
sin(x) dx = -du
Menjadi:
- ∫ 5 du/u
= -ln |u|
= -5 ln |cos(x)| + C
Kalo bisa dimengerti, Jangan lupa kasih bintang 5 :D