We have to solve 2 tan x - 1 = -tan (-x)
Now we know that tan -x = - tan x
2 tan x - 1 = -tan (-x)
=> 2 tan x - 1 = tan (x)
=> tan x - 1 = 0
=> tan x = 1
=> x = arc tan 1
=> x = 45 degrees and 225 degrees.
The required values of x = 45 degrees and x = 225 degrees
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