Mathematics · 2022
JEE Main · 29 June 2022, Shift 1 · Q24
The number of elements in the set S={θ ∈[-4 π, 4 π]: 3 cos^2 2 θ+6 cos 2 θ-10 cos^2 θ+5=0} is \ \ \ \.
The number of elements in the set $\displaystyle S=\left\{\theta \in[-4 \pi, 4 \pi]: 3 \cos ^2 2 \theta+6 \cos 2 \theta-10 \cos ^2 \theta+5=0\right\}$ is \_\_\_\_.
Official answer
32
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JEE Main 2022 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.