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

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

let f(theta)=(tan theta)/(1+tan theta) and alpha+beta=3(pi)/(4) the value of 2f(alpha)f(beta) is equal to

let f(theta)=(tan theta)/(1+tan theta) and alpha+beta=3(pi)/(4) the value of 2f(alpha)f(beta) is equal to

If sin alpha sin beta-cos alpha cos beta+1=0, then the value of 1+cot alpha tan beta is

If sin alpha sin beta - cos alpha cos beta + 1=0, then the value of 1+cot alpha tan beta is

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

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