" 1.If `sin x+sin y=(1)/(4),cos x+cos y=(1)/(3)` then `tan((x+y)/(2))=`

If sin x + sin y = a and cos x + cos y = b then tan ((x + y) / (2)) is

If sin x + sin y = (7) / (5) and cos x + cos y = (1) / (5) then sin (x + y) equal to

If sin x + cos y = (1) / (3) and cos x + sin y = (3) / (4) then tan ((xy) / (2)) =

If (sin x) (sin y) = 1, then (cos x) (cos y) =?

If (sin x)/(sin y)=(1)/(2),(cos x)/(cos y)=(3)/(2), where x,y in(0,(pi)/(2)), then the value of tan(x+y) is equal to

If cos x + cos y =(1)/(3) and sin x + sin y=(1)/(4) prove that tan ((x+y)/(2))=(3)/(4)

If sin x+sin y=a and cos x+cos y=b, then tan((x+y)/2 ' is equal to

If sin x + sin y = a , cos x - cos y = b then the value of tan ((y-x)/2) is _______ in terms of a and b.