Question

cotx X tanx=1 or 0?

Answer 1

cot * tan = 1 or zero is your question right?

Answer 2

since they are inverses; lets see what happens..

1 x
-- * --- = x/x = 1
x 1

5 2
-- * --- = 10/10 = 1
2 5

1 tan
--- * --- = tan/tan = 1
tan 1

cot 1
--- * --- = cot/cot = 1
1 cot


cot * tan = 1 :)