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Let f : [-1, -1/2] rarr [-1, 1] is defin...

Let `f : [-1, -1/2] rarr [-1, 1]` is defined by `f(x)=4x^(3)-3x`, then `f^(-1) (x)` is

A

`cos (1/3 cos^(-1) x)`

B

`cos (3 cos^(-1) x)`

C

`cos ((2pi)/3+1/3 cos^(-1) x)`

D

`sin (1/3 sin^(-1) x)`

Text Solution

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The correct Answer is:
C
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