The number of elements in the set S=\{\theta \in[-4 \pi, 4 \pi]: 3 \cos ^2 2 \theta+6 \cos 2 \theta-10 \cos ^2 \theta+5=0\} is [29-Jun-2022-Shift-1]

JEE Main 29 June 2022 Shift 1 Solved Paper

Section: Mathematics

Question : 24 of 90

Marks: +1, -0

The number of elements in the set S={θ∈[−4π,4π]:3cos22θ+6‌cos‌2‌θ−10cos2θ+5=0} is

[29-Jun-2022-Shift-1]

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