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

Prove the following identities : (1)/ (sec A + tan A) = sec A - tan A

sqrt((sec A-tan A)/(sec A+tan A))=?

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

IF ( sec A - tan A) ( sec B - tan B) ( sec C- tan C ) =(sec A + tan A ) ( sec B + tan B ) ( secC + tan C ) then each is equal to

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 the following identities : (sec A - tan A)/ (sec A + tan A) = 1 - 2 sec A tan A + 2 tan^(2) A

If k=( sec A + tan A) ( sec B+ tan B) sec C + tan C)=(sec A - tan A)(sec B- tan B)(sec C - tan C) " then " k=

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

Prove that (1)/(sec x-tan x)+(1)/(sec x+tan x)=(2)/(cos x)