[" घ) फलन "f(x)=1/x-1" तो रिद्ध कीजिए - "(1+tan A)(1-tan B)=2],[hline" ड) यदि "A-B=pi/4]

If A+B=pi/4 ,prove that (1+tan A)(1+tan B)=2

" tan " ((pi)/(4) +x) =(1 + tan x)/(1-tan x)

" tan " ((pi)/(4) -x) =(1 - tan x)/( 1+ tan x)

If A + B = (pi)/(4) , then prove that (1 + tan A) (1 + tan B) = 2

If f(x)=sec^(2)x then (1+tan A*tan B)^(2)+(tan A-tan B)^(2)=

If A+B=(pi)/(4), prove that: (1+tan A)(1+tan B)=2(cot A-1)(cot B-1)=2

tan^(- 1)(a/x)+tan^(- 1)(b/x)=pi/2 then x=

tan^(- 1)(a/x)+tan^(- 1)(b/x)=pi/2 then x=

If A+B=(pi)/(2)rArr Tan A Tan B=1 , rArr Tan(A-B)=(tan A-tan B)/(1+tan A tan B)=(tan A-tan B)/(2) , rArr tan A=tan B+2tan(A-B) , x= Tan""(5 pi)/(28)+2Tan""(pi)/(7) Then x

(tan ((pi)/(4) +x))/( tan ((pi)/(4) -x ))= ((1 + tan x )/( 1- tan x )) ^(2)