Expert Answers
lemjay eNotes educator| Certified Educator

`cot(x)*tan(x)`

To simplify, take note that the reciprocal of tangent is cotangent `(cot theta = 1/tan theta)` .

`=1/tan x * tan x`

`=tanx/tanx`

`=1`

Hence, `cot(x)*tan(x)=1` .

 

oldnick | Student

`cotx tang x = (cosx)/(senx) (sen x)/(cosx) = 1`