turunan dari f(x)= sinx / 1+cos

cosx/1-sin
kalo gak salah ya

f(x) = (sin x)/(1 + cos x) = u/v
u = sin x => u' = cos x
v = 1 + cos x => v' = - sin x
f'(x) = (u' v - v' u)/v^2
= (cos x . (1 + cos x) - (- sin x) sin x) / (1 + cos x)^2
= (cos x + cos^2 x + sin^2 x) / (cos x + 1)^2
= (cos x + 1) / (cos x + 1)^2
= 1/(cos x + 1)

^ = pangkat