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Let f: (-1, 1) to R be such that f(cos 4...

Let `f: (-1, 1) to R` be such that `f(cos 4theta) = (2)/(2-sec^(2)theta) ` for `theta in (0, (pi)/(4)) uu ((pi)/(4) , (pi)/(2))`. Then the value (s) of `f((1)/(3))` is (are)

A

`1- sqrt((3)/(2))`

B

`1+sqrt((3)/(2))`

C

`1-sqrt((2)/(3))`

D

`1+sqrt((2)/(3))`

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A, B
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VMC MODULES ENGLISH-TRIGONOMETRIC IDENTITIES AND EQUATIONS -JEE Main (Archive)
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