#x_num	y_num	Result
0,	0,	"#DIV/0!"
1,	1,	0.785398163397
-1,	-1,	-2.356194490192
-1,	1,	2.356194490192
1,	-1,	-0.785398163397
0.5,	1,	1.107148717794
-0.5,	2,	1.815774989922
1,	0.8,	0.674740942224
0.8,	-0.6,	-0.643501108793
1,	-9,	-1.460139105621
0.2,	0,	0.0
0.1,	0.2,	1.107148717794
0,	0.2,	1.570796326795
"A",	0.2,	"#VALUE!"
TRUE,	1,	0.785398163397
FALSE,	-2.5,	-1.570796326795