5*sin(x)+2*cos(y)=4 4*sin(x)+7*cos(y)=7

$$5 sin{left (x right )} + 2 cos{left (y right )} = 4$$

4*sin(x) + 7*cos(y) = 7

$$4 sin{left (x right )} + 7 cos{left (y right )} = 7$$

$$x_{1} = – {asin}{left (frac{14}{27} right )} + pi$$
=
$$- {asin}{left (frac{14}{27} right )} + pi$$
=

2.59647520722742

$$y_{1} = – {acos}{left (frac{19}{27} right )} + 2 pi$$
=
$$- {acos}{left (frac{19}{27} right )} + 2 pi$$
=

5.49298597260681

$$x_{2} = – {asin}{left (frac{14}{27} right )} + pi$$
=
$$- {asin}{left (frac{14}{27} right )} + pi$$
=

2.59647520722742

$$y_{2} = {acos}{left (frac{19}{27} right )}$$
=
$${acos}{left (frac{19}{27} right )}$$
=

0.790199334572779

$$x_{3} = {asin}{left (frac{14}{27} right )}$$
=
$${asin}{left (frac{14}{27} right )}$$
=

0.545117446362376

$$y_{3} = – {acos}{left (frac{19}{27} right )} + 2 pi$$
=
$$- {acos}{left (frac{19}{27} right )} + 2 pi$$
=

5.49298597260681

$$x_{4} = {asin}{left (frac{14}{27} right )}$$
=
$${asin}{left (frac{14}{27} right )}$$
=

0.545117446362376

$$y_{4} = {acos}{left (frac{19}{27} right )}$$
=
$${acos}{left (frac{19}{27} right )}$$
=

0.790199334572779

x1 = -9.969895407131756
y1 = 13.35656994893195

x2 = -5.73806786081721
y2 = 13.35656994893195

x3 = -9.969895407131756
y3 = -0.7901993345727791

x4 = 8.879660514407004
y4 = 13.35656994893195

x5 = -9.969895407131756
y5 = 0.7901993345727791

x6 = -9.969895407131756
y6 = 5.492985972606807

x7 = 2.596475207227417
y7 = 5.492985972606807

x8 = -9.969895407131756
y8 = -13.35656994893195

x9 = 2.596475207227417
y9 = 0.7901993345727791

x10 = -9.969895407131756
y10 = -5.492985972606807

x11 = -5.73806786081721
y11 = 0.7901993345727791

x12 = -5.73806786081721
y12 = 5.492985972606807

x13 = -5.73806786081721
y13 = -5.492985972606807

x14 = 6.828302753541963
y14 = 5.492985972606807

x15 = 6.828302753541963
y15 = 13.35656994893195

x16 = 2.596475207227417
y16 = 13.35656994893195

x17 = -5.73806786081721
y17 = -0.7901993345727791