[�}–¼] •Ç–ä—l‚X

 [˜A—§•û’öŽ®] Z=Sin(ƒÎ*X)*Sin(4*ƒÎ*Y)
                 +Sin(ƒÎ*Y)*Sin(4*ƒÎ*X)
              Z=0      ƒÎ=3.14159

 [•û’öŽ®‚Ì�À•WŒn] ’¼Œð�À•WŒn

 [•û’öŽ®‚Ì�À•W•Ï�”] X,Y

 [�F] Z=�ƒ0‚ÅŠŒ�F�AZ�„0‚ÅŠD�F�B

 [•û’öŽ®‚Ì‹O�Õ] •û’öŽ® Z=0‚Ì‹O�Õ‚ÍŠŒ�F
                ‚ÆŠD�F‚Ì‹«ŠE�ü�B

ƒOƒ‰ƒtƒBƒbƒNƒX‚Ì–ÚŽŸ‚Ö