The difference between the greatest and least values of the function, f (x) = cos x + 1 2…

Mathematics · JEE Main · NTA ExamsLimit, Continuity and Differentiability

The difference between the greatest and least values of the function, f (x) = cos x + \(\frac{1}{2}\) cos 2x –\(\frac{1}{3}\) cos 3x is :
  1. 4/3
  2. 1
  3. 9/4
  4. 1/6

Answer

(C) 9/4

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