40.2443sin (0.0729x + 4.6878) + 40.3295 = 90

40.2443sin (0.0729x + 4.6878) = 49.6705

sin (0.0729x + 4.6878) = 49.6705/40.2443 (= 1.234224474024893)

Because the function sine will only give out answers between -1 and 1

Therefore sin (0.0729x + 4.6878) = 1.234224474024893 is impossible

So there are no solutions to this equation