Tan of complementary of an angle is same as which of the angles?

Complementary angles :-

Two angle are said to be complementary if there sum is 90º.

i.e if one angle is θ than other angle is ( 90º - θ ).

ATQ,

Complementary angle of tanθ

= tan ( 90º - θ )

= cot θ            { using, tan ( 90º - θ ) = cot θ}