Integral cos x kuadrat : x kuadrat DX?

[tex] = \frac{ \cos( {x}^{2} ) }{ {x}^{2} } dx \\ [/tex]
[tex]u = \cos( {x}^{2} ) \\ {u}^{ l} = - 2 \sin( {x}^{2} ) \\ v = {x}^{2} \\ {v}^{l} = 2x[/tex]

hasil nya

= cosx^2 . x^-2
= 1/3 . -sin^3 . -x^-1
= -(1/3) . sin^3 . (-x)^-1