JEE Main 2019 — Maths solution

JEE Main2019Maths

Let

A = \,\,\left\{ {0 \in \left( { - \,\dfrac{\pi }{2},\pi } \right):\,\,\dfrac{{{\text{3 + 2i sin\theta }}}}{{{\text{1 - 2i sin\theta}}}}{\text{is purely imaginary}}} \right\}Then the sum of the elements in A is :

A
$\frac{5 π}{6}$
B
$\frac{2 π}{3}$
C
$\frac{3 π}{4}$
D
$π$

Solution

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