Sinx*Cosy+Siny*Cosx-Sinx*Cosy+Siny*Cosx/
/Cosx*Cosy-Sinx*Siny+Cosx*Cosy+Sinx*Siny=
2Siny*Cosx/2Sinx*Siny=Cosx/Sinx=Ctgx
9.4*1000=9400
2.2*100=220
9400+220=9620
X^2 + y^2 = 612
5x = - 20y
-----------------------
x = - 4y
16y^2 + y^2 = 612
17y^2 = 612
y^2 = 36
y1 = 6
y2 = - 6
x = - 4y
x1 = - 4*6 = - 24
x2 = - 4*( - 6 ) = 24
Ответ ( - 24 ; 6 ) ; ( 24 ; - 6 )