" Q "77" .If "a+beta=(pi)/(4)," then the value of "(1+tan alpha)(1+tan beta)" is "

If alpha+dot(beta)=(pi)/(4), then the value of (1+tan alpha)(1+tan beta)

If alpha + beta = 3pi//4 " then " (1- tan alpha ) (1- tan beta ) =

If tan alpha = 1/5, tan beta =(1)/(239), then the value of tan (4 alpha -beta) is

If tan alpha = 1/5, tan beta =(1)/(239), then the value of tan (4 alpha -beta) is

In sin alpha+ sin beta=(1)/(2) and cos alpha+ cos beta =(5)/(4) , find the value of tan alpha+tan beta .

If tan alpha =(1+2^(-x))^(-1) and tan beta =(1+2^(x+1))^(-1) then the value of (alpha + beta) is-

If alpha+beta=pi/(4), then (1+"tan"alpha)(1+"tan"beta) is

If alpha, beta are the roots of the equation 6x^(2) - 5x + 1 = 0 , then the value of (1)/(pi) [tan ^(-1) (alpha) + tan^(-1) (beta)] is ________

If tan ( alpha-beta) = (sin 2 beta)/(5-cos 2 beta),"find the value of " tan alpha : tan beta.

If alpha+beta=pi/4 then (1+tan alpha)(1+tan beta)=