A. $\frac{a}{\sqrt{a^{2} - b^{2}}}$

B. $\frac{b}{\sqrt{a^{2} - b^{2}}}$

C. $\frac{\sqrt{a^{2} - b^{2}}}{a}$

D. $\frac{\sqrt{a^{2} - b^{2}}}{b}$

সঠিক উত্তরঃ C.

\frac{\sqrt{a^{2} - b^{2}}}{a}

Explanation:

A. aa2-b2 B. ba2-b2 C. a2-b2a D. a2-b2b