sin(2*x)*sin(y)+sin(x)*cos(y)=1/(sqrt(2)) cos(2*x)*sin(y)+cos(x)*cos(y)=1/(sqrt(2))

1
cos(2*x)*sin(y) + cos(x)*cos(y) = —–
___
/ 2

x1 = -5.890486225480862
y1 = 1.570796326794897

x2 = -13.74446785945535
y2 = 10.99557428756428

x3 = 10.99557428756425
y3 = -14.92256510455156

x4 = -5.497787143782138
y4 = -6.283185307179586

x5 = -8.639379797371931
y5 = -3.141592653589793

x6 = 7.068583470577035
y6 = 6.283185307179586

x7 = 0.7853981633974483
y7 = 6.283185307179586

x8 = -9.032078879070656
y8 = 1.570796326794897

x9 = -10.60287520586555
y9 = 10.99557428756428

x10 = -2.356194490192345
y10 = -3.141592653589793

x11 = -12.17367153266045
y11 = -4.71238898038469

x12 = 1.963495408493621
y12 = 10.99557428756428

x13 = -14.13716694115407
y13 = -2.356194490192345

x14 = -1.570796326794897
y14 = 10.21017612416683

x15 = 10.21017612416683
y15 = 9.42477796076938

x16 = -27.48893571891069
y16 = -3.141592653589793

x17 = 0.3926990816987242
y17 = 7.853981633974483

x18 = -10.60287520586555
y18 = -1.570796326794897

x19 = -5.497787143782138
y19 = 6.283185307179586

x20 = 4.71238898038469
y20 = 3.926990816987242