Simplify: `tan(π/4 + θ/2)+tan( π/4 − θ/2)` is equal to

2 tan^(-1) (-2) is equal to

Simplify tan^(-1) (tan. (5pi)/6)

IF 0 lt x lt (pi)/(2) then tan (pi/4 +x) + tan "(pi/4-x) is equal to

tan^(-1)((1)/(4))+tan^(-1)((2)/(9)) is equal to

The value of (2tan30^(@))/(1-tan^(2)30^(@)) is equal to

The numerical value of tan(pi/3)+2tan((2pi)/3)+4tan((4pi)/3)+8tan((8pi)/3) is equal to (A) -5sqrt(3) (B) -5/(sqrt3) (C) 5sqrt(3) (D) 5/(sqrt3)