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Let RR be the set of real numbers and f,...

Let `RR` be the set of real numbers and `f, Rrto RR` be defined by `f (x)= cos ec x(x ne npi, n in z):` then image set of f is-

A

`{f(x) in RR: f (x) ge 1}`

B

`{f(x) in RR: f (x) le 1}`

C

`{f(x) in RR: |f(x) |ge 1}`

D

`{ f(x) in RR : |f(x) |gt1}`

Text Solution

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The correct Answer is:
C
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