" 9."fp" tan "^(-1)x+tan^(-1)y=(pi)/(4),xy<1," then write the value "f(x+y+xy,theta)

If tan ^(-1) x-tan ^(-1) y=-(pi)/(4) then

Fill in the blanks choosing correct answer from the brackets. If x+y=4,xy=1 , then "tan"^(-1)x+"tan"^(-1)y= …. . ((3pi)/(4),pi/(4),pi/(2))

If tan^(-1)x+tan^(-1)y=(pi)/(4), then (1+x)(1+y) is equal to

If tan^(-1)x+tan^(-1)y=(pi)/(4) , and the value of xy<1 ,then show that x+y+xy=1 .

If tan^(-1)x+tan^(-1)y=(pi)/(4), then write the value of x+y+xy.

If tan^(-1) x + tan^(-1) y =(pi)/(4) then...

If tan^(-1)x+tan^(-1)y=(pi)/(4) , then cot^(-1)x+cot^(-1)y=