已知a sin x= b cos y。試寫出a,b,x,y可能的值

as same as linear equation in two inknown but there is only one equation.

x+y = 4 , There are lots of pair of x,y .... (2,2) (1,3) ...
So the answer is as infinity ... no soluton

我可以寫出a,b,x,y可能的值

比如 a = b ,將約成
sin x = cos y
sin x = sin(90-y)
x = 90 - y

x+y = 90 , 我可以給 x=45 , y = 45

x y
1,89
2,88
3,87
4,86
.....

a,b 又可以給無限個數值...
1,2,3,4,5

...

2sin89 = 2cos1
5sin46 = 5cos44

The question is not ask clearly, please tell the details