যদি, $x=a(\theta+\sin \theta), y=a(1-\cos \theta)$ হয়,তবে $\frac{\mathrm{d}^{2} \mathrm{y}}{\mathrm{dx}}$ -এর মান হলো-

$\frac{a}{(1+\cos \theta)^{2}}$

$\frac{a}{(1-\cos \theta)^{2}}$

$\frac{1}{a(1-\cos \theta)^{2}}$

$\frac{1}{a(1+\cos \theta)^{2}}$

$\frac{1}{(1+\cos \theta)^{2}}$