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If f(x)="cos"^(2)x+"sec"^(2)x, then (i...

If `f(x)="cos"^(2)x+"sec"^(2)x`, then
(i) `f(x)lt1`
(ii) `f(x)=1`
(iii) `2ltf(x)lt1`
(iv) `f(x)ge2`

A

`f(x)lt1`

B

`f(x)=1`

C

`2ltf(x)lt1`

D

`f(x)ge2`

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Knowledge Check

  • (d)/(dx) (AC)= f(x) (MC-AC) , then f(x)= (i) (1)/(x) (ii) x (iii) x^(-2) (iv) -x^(-1)

    A
    `(1)/(x)`
    B
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    C
    `x^(-2)`
    D
    `-x^(-1)`

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