Trigonometric EquationHard
Question
If f(x) = (2x - π)3 + 2x - cosx, then
(f-1 (x)) at x = π is equal to -
Options
A.1/2
B.1/3
C.1/4
D.1/5
Solution
g′(y) =
⇒ g′(π) 
(where g is inverse of f)

(where g is inverse of f)
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