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

If alpha + beta =(pi)/(2)and beta + gamma =alpha, then the value of tan alpha is -

If tan alpha = 7/5, tan beta=5/7 " then find the values of " tan (alpha + beta) " and " cot (alpha - beta)

If 2 sin 2alpha= | tan beta+ cot beta |alpha,beta, in((pi)/(2),pi) , then the value of alpha+beta is

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