The number of values of x where the function f ( x ) = cos x + cos attains its maximum, is
Mathematics · JEE Advanced · NTA Exams — Trigonometry
The number of values of x where the function f (x) = cos x + cos 
attains its maximum, is
attains its maximum, is- 0
- 1
- 2
- infinite
Answer
(D) infinite
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