if `tan alpha = 2tanbeta` show that `(sin(alpha+beta))/(sin(alpha-beta)) = 3`

if tan alpha=2tan beta show that (sin(alpha+beta))/(sin(alpha-beta))=3

If sin2 alpha=4sin2 beta, show that 5tan(alpha+beta)=3tan(alpha+beta)

If 3 sin alpha=5 sin beta , then (tan((alpha+beta)/2))/(tan ((alpha-beta)/2))=

If sin alpha+sin beta=a and cos alpha+cos beta=b show that sin(alpha+beta)=(2ab)/(alpha^(2)+beta^(2))

If n tan alpha=(n+1)tan beta then show that tan(alpha-beta)=(sin2 beta)/(2n+1-cos2 beta)

If 3sin alpha=5sin beta, then (tan((alpha+beta)/(2)))/(tan((alpha-beta)/(2)))=

If 3sin alpha=5sin beta, then (tan((alpha+beta)/(2)))/(tan((alpha-beta)/(2)))=

If 3tan alpha=4tan beta ,then prove that tan(alpha-beta)=(sin beta*cos beta)/(3+sin^(2)beta)=(tan beta)/(4tan^(2)beta+3)

If tan theta=(tan alpha+tan beta)/(1+tan alpha tan beta) then show that sin2 theta=(sin2 alpha+sin2 beta)/(1+sin2 alpha sin2 beta)

If tan beta=cos theta tan alpha , then prove that tan^(2)""(theta)/(2)=(sin(alpha-beta))/(sin(alpha+beta)) .