kak tolong kerjakan soal integral

[tex] \int {\frac{x.sin \sqrt{x^2+4}}{\sqrt{x^2+4}} } \, dx [/tex]
misal: u = √(x²+4)
          du = [tex] \frac{x}{\sqrt{x^2+4}} dx[/tex]

[tex] \int {\frac{x\,sin \sqrt{x^2+4}}{\sqrt{x^2+4}} } \, dx = \int {\frac{x\,sin (u)}{\sqrt{x^2+4}} \frac{\sqrt{x^2+4}}{x}} \, du = \int{sin(u)} \, du =-cos\, u +C[/tex]
[tex]=-cos\, \sqrt{x^2+4} +C[/tex]

Materi integral Trigonometri <<<>