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using those formulas, how would you solve
tan 11 pi
-----
8
and cot 195
also, how would you prove tan (x +y ) = tan x
and tan ( pi/4 -x) = 1 - tan x
---------
1 + tan x
thank you so much for any help
tan 11 pi
-----
8
and cot 195
also, how would you prove tan (x +y ) = tan x
and tan ( pi/4 -x) = 1 - tan x
---------
1 + tan x
thank you so much for any help