" 12.If "alpha,beta" are real,what is "|(alpha+i beta)/(beta+i alpha)|" equal to? "

If alpha, beta are real, what is |(alpha+ibeta)/(beta+ialpha)| equal to ?

If alphaand beta are real them |(alpha+i beta)/(beta+ialpha)|=

(alpha)/(beta) + (beta)/(alpha)

If alpha and beta Are different complex number with |alpha|=1, then what is |(alpha- beta)/(1-alpha beta)| equal to ?

The real part of sinh (alpha + I beta) is

If sin (alpha+beta)=1, sin (alpha-beta)=1/2 , then tan (alpha+ 2beta). tan (2 alpha+beta) is equal to :