[tex]y=tan(arcsin(x))=\frac{sin(arcsin(x)}{cos(arcsin(x))}\\\\We\ know:\\sin(arcsin(x))=x\ and\ cos(arcsin(x))=\sqrt{1-x^2}\\\\therefore:y=\frac{x}{\sqrt{1-x^2}}\\\\y'=\left(\frac{x}{\sqrt{1-x^2}}\right)'=\frac{x'\sqrt{1-x^2}-x(\sqrt{1-x^2})'}{(\sqrt{1-x^2})^2}=\frac{\sqrt{1-x^2}-x\cdot\frac{1}{2\sqrt{1-x^2}}\cdot(-2x)}{1-x^2}\\\\=\frac{\sqrt{1-x^2}+\frac{x^2}{\sqrt{1-x^2}}}{1-x^2}=\frac{\frac{1-x^2+x^2}{\sqrt{1-x^2}}}{1-x^2}=\frac{1}{(1-x^2)\sqrt{1-x^2}}=\frac{1}{(1-x^2)(1-x^2)^\frac{1}{2}}[/tex]
[tex].\center\boxed{=\frac{1}{(1-x^2)^\frac{3}{2}}}[/tex]
