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" 18.Show that "(tan((pi)/(4)+A)+tan((pi...

" 18.Show that "(tan((pi)/(4)+A)+tan((pi)/(4)-A))/(tan((pi)/(4)+A)-tan((pi)/(4)-A))=cosec2A.

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Prove that: (tan(pi/4+A)+tan(pi/4-A))/(tan(pi/4+A)-tan(pi/4-A))="cosec"2A

Prove that: (tan(pi/4+A)+tan(pi/4-A))/(tan(pi/4+A)-tan(pi/4-A))="cosec"2A

{(tan((pi)/(4)+theta)+tan((pi)/(4)-theta))/(tan((pi)/(4)+theta)-tan((pi)/( 4)-theta)))

Simplify tan ((pi)/(4) +A) tan ((pi)/(4)-A)

tan(pi/4)tan((3pi)/4)+1=?

tan((pi)/(4)+theta)-tan((pi)/(4)-theta)=?

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

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

Prove that: tan(pi/4+A). Tan((3pi)/4)+A=-1