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If y = "Tan"^(-1)((1)/(cos^2 x + cos x +...

If `y = "Tan"^(-1)((1)/(cos^2 x + cos x + 1)) + "Tan"^(-1)(1/(cos^2x + 3 cos x + 3))+ `….upto n term then `f^(1)(0) `=

A

0

B

1

C

`pi/2`

D

`pi`

Text Solution

Verified by Experts

The correct Answer is:
A
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