" 12."(sec8A-1)/(sec4)*(tan84)/(tan2A)

(sec8A-1)/(sec4A-1)=(tan 8A)/(tan2A)

Prove that (sec8A-1)/(sec4A-1)=(tan8A)/(tan2A)

Prove that (sec 8A-1)/(sec 4A-1)=(Tan8A)/(Tan2A)

Prove that (sec8x-1)/(sec4x-1)=(tan8x)/(tan2x)

Prove that (sec 8 A-1)/(sec 4A -1)=(tan 8A)/(tan 2A) .

Prove that (i) (sec 8A -1)/(sec 4A -1) =(tan 8A)/(tan 2A) (ii) (cos A+ sin A)/(cos A - sin A)-(cos A-sin A)/(cos A+sin A)=2 tan 2A

Prove that (sec 8A-1)/( sec 4 A -1) = ( tan 8 A)/( tan 2A).

(sec8A-1)/(sec4A-1) is equal to (A) (tan2A)/(tan8A) (B) (tan8A)/(tan2A) (C) (cot8A)/(cot2A) (D) none of these

(sec8A-1)/(sec4A-1) is equal to (A) (tan2A)/(tan8A) (B) (tan8A)/(tan2A) (C) (cot8A)/(cot2A) (D) none of these

Prove that: (sec8 theta-1)/(sec4 theta-1)=(tan8 theta)/(tan2 theta)