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Applying Lagrange's mean value theorem f...

Applying Lagrange's mean value theorem for a suitable function f(x) in [0, h], we have `f(h)=f(0)+hf'(thetah),0 lt theta lt1`. Then for `f(x)=cosx`, the value of `underset(h to0+)lim theta` is-

A

1

B

0

C

`(1)/(2)`

D

`(1)/(3)`

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