x= ρ *cos φ
y= ρ *sin φ
x^(2)+ y^(2)= R ^2
(ρ *cos φ )^2+( ρ *sin φ )^2= R ^2
так как cos^(2) φ +sin^(2) φ =1,
то
ρ^2= R ^2
1.
[b]х = —1,[/b]
ρ *cos φ =-1
⇒
[b] ρ =-1/cos φ [/b]
2.
[blue][b]у=8,[/b][/blue]
ρ *sin φ =8
⇒
[blue][b]ρ =8/sin φ[/b][/blue]
3.
[b]у+х = -3, [/b]
ρ *sin φ+ ρ *cos φ =-3
[b]ρ =-3/(sin φ +cos φ )[/b]
4.
[blue][b]х^2+ у^2 = 10, [/b]
[/blue]
⇒ ρ ^2=10
[blue][b]ρ =sqrt(10)[/b]
[/blue]
5.
[b]х^2 + у^2 =х, [/b]
ρ ^2= ρ *cos φ
[b]ρ =cos φ [/b]
6
[blue][b]х^2+ у^2= —2у[/b][/blue]
ρ ^2=-2* ρ *sin φ
[blue] [b]ρ =-2sin φ [/b]
[/blue]