[" 5."cot2A+tan A=],[[" (in) "sin2A," (B) "cosec2A," (C) "cos2A," sec2A "]]

Prove that: cot^2A-tan^2A=4\ cot2A cos e c2A

If 2A is not an integral multiple of pi , then show that i) cot A+tan A=2"cosec " 2A ii) cot A-tan A=2 cot2A and deduce the values of tan52 1^(@)/2 and tan37 1^(@)/2

(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

If tan(cot x) = cot (tan x) , then sin 2x =

If tan A + cot A = 5, find the value of tan^2 A + cot^2 A .

(1)/(tan 3 A - tan A)- (1)/(cot 3 A - cot A)= .............. A) tan A B) tan 2A C) cot A D) cot 2A

(cot A+tan B)/(cot B+tan A)=cot A tan B

tan "" (pi)/(5) + 2 tan "" (2pi)/(5) + 4 cot "" (4pi)/(5)=