" 9.If "sin x=15/17" and "cos y=12/13,0tan(x+y)

If sin x = (15)/(17) and cos y = (12)/(13),0 lt x lt (pi)/(2) , 0 lt y lt (pi)/(2) , find the values of tan(x + y)

If sin x = (15)/(17) and cos y = (12)/(13),0 lt x lt (pi)/(2) , 0 lt y lt (pi)/(2) , find the values of sin (x + y)

If sin x = (15)/(17) and cos y = (12)/(13),0 lt x lt (pi)/(2) , 0 lt y lt (pi)/(2) , find the values of cos(x - y)

If sin alpha=15/17 and cos beta=12/13 , find the values of : tan (alpha+beta) .

If sin alpha=(15)/(17) and cos beta=(12)/(13) find the values of sin(alpha+beta),cos(alpha-beta) and tan(alpha+beta)

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

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