Which one is not periodic?

Question:

Which one is not periodic?

  1. $|\sin 3 x|+\sin ^{2} x$

  2. $\cos \sqrt{x}+\cos ^{2} x$

  3. $\cos 4 x+\tan ^{2} x$

  4. $\cos 2 x+\sin x$

Correct Option: 2

JEE Main Previous Year 1 Question of JEE Main from Mathematics Trigonometry chapter.
JEE Main Previous Year 2002

Solution:

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