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Differentiation question

2020 · 9 Jan · Shift 2 · Q33

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PYQ Library
JEE Main
Mathematics
Differentiation
2020 · 9 Jan · Shift 2 · Q33

Differentiation question

2020 · 9 Jan · Shift 2 · Q33

JEE MainMathematicsDifferentiationMCQ+4 / −1

If

x = 2\sin \theta - \sin 2\theta

and

y = 2\cos \theta - \cos 2\theta

,

\theta \in \left[ {0,2\pi } \right]

, then

{{{d^2}y} \over {d{x^2}}}

at

\theta

=

\pi

is :

A
${3 \over 8}$
B
${3 \over 2}$
C
${3 \over 4}$
D
- ${3 \over 4}$

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