y+cos(x)=0 (5*sqrt(cos(x))-1)*(2*y-1)=0

2.09439510239320

$$y_{1} = frac{1}{2}$$
=
$$frac{1}{2}$$
=

0.5

4.18879020478639

$$y_{2} = frac{1}{2}$$
=
$$frac{1}{2}$$
=

0.5

4.75239965473868

$$y_{3} = – frac{1}{25}$$
=
$$- frac{1}{25}$$
=

-0.0400000000000000

1.53078565244091

$$y_{4} = – frac{1}{25}$$
=
$$- frac{1}{25}$$
=

-0.0400000000000000

x1 = -10.47197551196598 – 1.556010873848837e-27*i
y1 = 0.5 – 1.741694026915156e-27*i

x2 = -1.530785652440908 – 8.660625228179627e-32*i
y2 = -0.04 + 8.614532371333403e-32*i

x3 = -2.094395102393195 – 4.184392681467364e-38*i
y3 = 0.5 + 4.454753041460951e-38*i

x4 = -8.377580409572782 – 2.962086741140189e-28*i
y4 = 0.5 + 2.886363526637388e-28*i

x5 = -7.813970959620494 + 1.180037868358494e-31*i
y5 = -0.04 – 1.173757571220745e-31*i

x6 = 2.094395102393195 + 2.016541014685133e-24*i
y6 = 0.5 + 8.36727734842215e-23*i

x7 = -4.188790204786391 + 1.818140418235718e-28*i
y7 = 0.5 + 2.313860735549257e-28*i

x8 = -10.47197551196598 – 4.570562248149263e-34*i
y8 = 0.5 – 4.379080463034685e-34*i

x9 = -2.094395102393195 – 3.502128225290568e-29*i
y9 = 0.5 + 4.056100495500569e-29*i

x10 = -10.47197551196598 + 2.823251176563751e-32*i
y10 = 0.5 + 3.307223949451678e-32*i

x11 = -10.47197551196598 + 2.267925792023978e-23*i
y11 = 0.5 + 2.411927706387977e-23*i

x12 = 7.813970959620494 – 1.180037868358494e-31*i
y12 = -0.04 – 1.173757571220745e-31*i

x13 = -4.752399654738679
y13 = -0.0400000000000000

x14 = 2.094395102393195 + 4.184392681467364e-38*i
y14 = 0.5 + 4.454753041460951e-38*i

x15 = 2.094395102393195 + 1.856869114971478e-37*i
y15 = 0.5 + 1.665566090699397e-37*i

x16 = -10.47197551196598 + 1.289281391811716e-31*i
y16 = 0.5 + 2.099583291193564e-31*i

x17 = -7.813970959620494
y17 = -0.0400000000000000

x18 = -2.094395102393195 – 2.016541014685133e-24*i
y18 = 0.5 + 8.36727734842215e-23*i

x19 = -2.094395102393195 – 1.856869114971478e-37*i
y19 = 0.5 + 1.665566090699397e-37*i

x20 = 10.47197551196598 + 1.556010873848837e-27*i
y20 = 0.5 – 1.741694026915156e-27*i

x21 = 7.813970959620494
y21 = -0.0400000000000000