yang genap aja: bab turunan

Turunan

12. y =sin(4x³- 5)
y' = 12x² cos (4x³ -5)

14.
y =2 cos² x - 3 cos x
y' = 4 cos x (-sin x) - 3 (-sin x)
y'= -4 sin x cos x + 3 sin x
y' = sin x ( -4cos x + 3)

16.
y = (x²-1) sin 4x
y' = (2x)(sin 4x) + (x²+1)(4 cos  4x)
y' = 2x sin 4x + (4x² +4) cos 4x

18.
y = sec 3x
y' =  3 tan 3x  sec 3x
x = π/6
y' =  3 tan π/2  sec π/2


20.
y = cos² x - sin² x
y = cos 2x
y' = - 2 sin 2x
x= π
y' = -2 sin 4π
y'=2(0)
y' = 0