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Question: PROBLEM WITH 'ISOLATE'

Question:PROBLEM WITH 'ISOLATE'

Jim Boyce 5 Maple
July 12 2013
1


EXCERPT  WITH  ISOLATE  QUESTION  -

 

> 

restart; with(plots)
> 

eq18 := (x^2+y^2)^2 = a^2*(x^2-y^2);

(x^2+y^2)^2 = a^2*(x^2-y^2)

 (1)
> 

eq19 := subs(x = r*cos(theta), y = r*sin(theta), eq18);

(r^2*cos(theta)^2+r^2*sin(theta)^2)^2 = a^2*(r^2*cos(theta)^2-r^2*sin(theta)^2)

 (2)
> 

eq20 := isolate(eq19, r^2);

r^2 = 0

 (3)
> 

eq21 := isolate((r^2*cos(theta)^2+r^2*sin(theta)^2)^2 = a^2*(r^2*cos(theta)^2-r^2*sin(theta)^2), r^2)

r^2 = 0

 (4)
> 

NULL
> 

``

 



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