যদি \(\rm f(x)=\begin{vmatrix}x^n&\sin x&\cos x\\\ n!& \sin \left(\frac{n\pi}{2}\right)&\cos \left(\frac{n\pi}{2}\right)\\\ a&a^2&a^3\end{vmatrix}\) হয়, তাহলে x = 0 তে \(\rm \frac{d^n}{dx^n}[f(x)]\) এর মান নির্ণয় করো।

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