## 205 Reputation

16 years, 25 days

## excellent, thank you very much, Robert...

excellent,

thank you very much,

Robert Israel

## Thanks for Robert Israel and Kamel,...

Thanks for Robert Israel and Kamel,

but the problem is still unsolved.

for the equation tan(x)-y,

the command below can see more detail near x=Pi/2,

plots[implicitplot](subs(x = (1/100)*x, tan(x)-y), x = 154 .. 160, y = -200 .. 200, gridrefine = 3, signchange = false, grid = [200, 200]),

but for my equation,

plots[implicitplot](subs(x = (1/100)*x, tan(x*sqrt(cp^2/3220^2-1))*(cp^2/3220^2-2)^2+4*tan(x*sqrt(cp^2/6450^2-1))*sqrt((cp^2/3220^2-1)*(cp^2/6450^2-1)) = 0), x = 0 .. 400, cp = 0 .. 4000, gridrefine = 7, signchange = false)

the command above doesn't work,

so, is there any better method to get the detail for my equation?

## Thanks for Robert Israel and Kamel,...

Thanks for Robert Israel and Kamel,

but the problem is still unsolved.

for the equation tan(x)-y,

the command below can see more detail near x=Pi/2,

plots[implicitplot](subs(x = (1/100)*x, tan(x)-y), x = 154 .. 160, y = -200 .. 200, gridrefine = 3, signchange = false, grid = [200, 200]),

but for my equation,

plots[implicitplot](subs(x = (1/100)*x, tan(x*sqrt(cp^2/3220^2-1))*(cp^2/3220^2-2)^2+4*tan(x*sqrt(cp^2/6450^2-1))*sqrt((cp^2/3220^2-1)*(cp^2/6450^2-1)) = 0), x = 0 .. 400, cp = 0 .. 4000, gridrefine = 7, signchange = false)

the command above doesn't work,

so, is there any better method to get the detail for my equation?