Question

Question #2259b

Answer 1

`1/(sec(t)-tan(t))-1/(sec(t)+tan(t))`

`=((sec(t)+tan(t))-(sec(t)-tan(t)))/(sec^2t-tan^2t)`

`=(sect+tant-sect+tant)/(sec^2t-tan^2t)`

`=(2tant)/1=2tant`