सिद्ध कीजिए कि -
` cot. A/2 - tan. A/2 = 2 cot A.`

tan A-cot A=-2cot2A

cot x-2 cot 2x = tan x

tan A + cot A = 2 cosec 2A

Prove that tan A - cot A =-2 cot2A

If A is not an integral multiple of (pi)/(2) , prove that (i) tan A + cot A= 2 cosec 2 A (ii) cot A - tan A = 2cot 2A

tan A + cot 2A=

tan A cot (A//2)-1=

If 2 tan A + cot A = tan B , then cot A +2 tan (A-B)=

cot ((A)/(2))-tan((A)/(2))= A) 2 sin A B) 2 cos A C) 2 tan A D) 2 cot A

( ( 1 + tan ^ 2 A )/( 1 + cot ^ 2 A )) = (( 1 - tan A)/ ( 1 - cot A )) ^ 2 = tan ^ 2 A