Find the principal value of each of the following :
[Formula: tan(π – x) = -tan (x) , as tan is negative in the second quadrant. ]
= 
[Formula: tan-1(tan x) = x ]
= 
1
Find the principal value of each of the following :
[Formula: tan(π – x) = -tan (x) , as tan is negative in the second quadrant. ]
=
[Formula: tan-1(tan x) = x ]
=