(tan A+sec A-1)/(tan A-sec A+1)=

int(tan x+sec x-1)/(tan x-sec x+1)dx

If tan y=(tan x+sec x-1)/(tan x-sec x+1) show that (dy)/(dx)=(1)/(2)

If tan y=(tan x+sec x-1)/(tan x-sec x+1), " show that, " (dy)/(dx)=(1)/(2) .

If (tan A + sec A) (tan B + sec B) (tan C + sec C) = (tan A -sec A) (tan B -secB) (sec C-tan C),show that each side is equal to +-1

(tan A)/(1+sec A)-(tan A)/(1-sec A)=2cosec A

(sec A+tan A-1)(sec A-tan A+1)=2tan A

If (sec A + tan A)(sec B + tan B)(sec C + tan C) = (sec A- tan A)(sec B- tan B)(sec C tan C) Prove that each side is equal to +-1.

Prove that : (sec A - cosec A ) (1 + tan A + cot A)= tan A sec A-cot A cosec A .

Prove that (sec A+1)/(tan A)=(tan A)/(sec A-1)