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

Simplify tan(-23 (pi)/3)

Simplify: tan(pi/4 + theta) tan ((3pi)/4 + theta)

Solve : tan ((pi)/(4)+ theta) + tan ((pi)/(4) - theta) = 4

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

Prove that tan ((pi)/(4) + theta)- tan ((pi)/(4) - theta) = 2 tan 2 theta .

If 0 lt x lt (pi)/(4), then sec 2x - tan 2x= ................ A) tan (x- (pi)/(4)) B) tan ((pi)/(4) -x) C) tan (x+(pi)/(4)) D) tan ^(2) (x+ (pi)/(4))

(i)Simplify tan(pi/4+theta)

If x=tan ((pi)/(4)+A)+tan(B-(pi)/(4)) and y=tan ((pi)/(4)+A)*tan (B-(pi)/(4)) then (x)/(1-y)=