MCQ
फलन $f(x)=\cos \frac{x}{3}$ का परिसर है-
  • A
    (0, ∞)
  • B
    $\left(-\frac{1}{3}, \frac{1}{3}\right)$
  •  [−1, 1]
  • D
    [0, 1]

Answer

Correct option: C.
 [−1, 1]
(C) [−1, 1]

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