If tan x=(-5)/(12) " and " (pi)/(2) lt x...

If tan `x=(-5)/(12) " and " (pi)/(2) lt x lt pi ` find the value of `cos 2x`

A

`-(7)/(17)`

B

`(7)/(17)`

C

`-(119)/(169)`

D

`(119)/(169)`

Verified by Experts

The correct Answer is:

D

Use the relation cos " 2x =(1-tan^(2) x)/(1+ tan^(2)x)`

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