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If tan^(- 1)\ 1/4+tan^(- 1)\ 2/9=1/2cos^...

If `tan^(- 1)\ 1/4+tan^(- 1)\ 2/9=1/2cos^(- 1)x` then `x` is equal to

A

`(1)/(2)`

B

`(2)/(5)`

C

`(3)/(5)`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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