यदि f(x)=cos^(2)x + sec^(2)x, तो -...

यदि `f(x)=cos^(2)x + sec^(2)x`, तो -

A

`f(x)lt 1`

B

`f(x)=1`

C

`1 lt f(x) lt 2`

D

`f (x) ge 2`

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