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MHT CET 2021 20th September Morning Shift
MCQ (Single Correct Answer)
+2
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If $$x=a \cos \theta, y=b \sin \theta$$, then $$\left[\frac{d^2 y}{d x^2}\right]_{\theta=\frac{\pi}{4}}=$$

A
$$2\left(\frac{a^2}{b}\right)$$
B
$$\sqrt{2}\left(\frac{\mathrm{a}^2}{\mathrm{~b}}\right)$$
C
$$-2 \sqrt{2}\left(\frac{b}{a^2}\right)$$
D
$$2 \sqrt{2}\left(\frac{\mathrm{b}}{\mathrm{a}^2}\right)$$
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