tan x + cotan x = ......

sin x/cos x + cos x/ sinx
sin^2 x / sinx cos x + cos^2 x / sin x cos x
(sin^2 x + cos^2 x)/sinxcosx
1/sinxcosx
sec x . cosec x

atau

1/sinx cos x
2/2 sinx cos x
2/sin2x
2 cosec2x