Question 984820
to do this we need cos x and cos y
sin^2x+cos^2x=1
.64 +cos^2= 1
cos^2x =0.36; cos x=0.6
In the same way sin y=0.6; cos y=0.8
;;
sin (x+y)=0.64+0.36=1
x=53.1 deg
y=36.9 deg
sin 90=1