JEE MAIN - Mathematics Hindi (2019 - 9th January Evening Slot - No. 7)
यदि $$\mathrm{x}=3 \tan \mathrm{t}$$ तथा $$\mathrm{y}=3 \sec \mathrm{t}$$ है, तो $$\mathrm{t}=\frac{\pi}{4}$$ पर $$\frac{\mathrm{d}^{2} \mathrm{y}}{\mathrm{dx}^{2}}$$ का मान है-
$$\frac{1}{3 \sqrt{2}}$$
$$\frac{1}{6 \sqrt{2}}$$
$$\frac{3}{2 \sqrt{2}}$$
$$\frac{1}{6}$$
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