Question

If sin x sin y =1/4 and 3tanx=4tany then prove that sin(x+y)=7/16

Answer 1

@hartnn

Answer 2

@satellite73 , @UnkleRhaukus

Answer 3

I was able to get

sin(x+y) = 7/12 (cot x)

And

\[\huge cos x = \cfrac{-1\pm \sqrt{1+36cos^{2}y}}{6 cos y}\]

Answer 4

I have an exam so plsssssssss help me