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The function f(x)=cos x - 2ax is monoton...

The function `f(x)=cos x - 2ax` is monotonically decreasing when-

A

`p le (1)/(2)`

B

`p ge (1)/(2)`

C

`p ge -(1)/(2)`

D

`p le -(1)/(2)`

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The correct Answer is:
B
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