The number of solutions of the equation $2 \theta-\cos ^{2} \theta+\sqrt{2}=0$ is $R$ is equal to
The number of solutions of the equation $2 \theta-\cos ^{2} \theta+\sqrt{2}=0$ is $R$ is equal to
- [JEE MAIN 2022]
- A
$1$
- B
$2$
- C
$3$
- D
$4$
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