Microsoft doing in 2021, what Apple did in 1999.

(Microsoft PowerToys for XP had a graphing calculator but it doesn't support inequalities.)

I coincidentally had to fire up Sheepshaver recently so I've got it on hand. I put that inequality in the MacOS 8 Graphing Calculator and it gave me a nice looking checkerboard. Except I had to write it as "sin(x)sin(y)<0" or else it would think I meant "sin(xsin(y))<0", which is pretty itself.

I was going for sin(x)sin(y)>0.1, but I never got that far with the Windows one. Here it is in Desmos, you can move the slider:

https://www.desmos.com/calculator/izui2rwylh