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Question: general solution of ODE

Question:general solution of ODE

TianyuCheng 40 Maple
ode homework dsolve differential-equations
March 09 2020
1
This question is related to the Question The phase portrait of ode system

solve it by Maple , get the following form solution, what's the Int(1,0)

 


 

> 

restart;

 

> 

ODE :=diff(r(t),t)=r(t)*(1-r(t)^2)+mu*r(t)*cos(t)

diff(r(t), t) = r(t)*(1-r(t)^2)+mu*r(t)*cos(t)

 (1)
> 

dsolve(ODE)

r(t) = ((_C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t)))*exp(2*t+2*mu*sin(t)))^(1/2)/(_C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t))), r(t) = -((_C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t)))*exp(2*t+2*mu*sin(t)))^(1/2)/(_C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t)))

 (2)
> 

g := unapply(sqrt((C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t)))*exp(2*t+2*mu*sin(t)))/(C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t))), t)

proc (t) options operator, arrow; ((C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t)))*exp(2*t+2*mu*sin(t)))^(1/2)/(C1+2*(Int((exp(t))^2*(exp(mu*sin(t)))^2, t))) end proc

 (3)
> 

g(0)

1/(C1+2*(Int(1, 0)))^(1/2)

 (4)

``


 

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