Warning: Explicit solution could not be found. What am i doing wrong?

I only have one variable and and one equation and i am very new to Matlab.

the code is

syms t

>> solve(((t/5 - 2*cos(2*t))^2 + (4*sin(4*t) - 1)^2)^(1/2)=0)
Warning: Explicit solution could not be found. 
> In solve at 83

ans =

[ empty sym ]

Answer 1

[Walter Roberson]

The "=0" part should have given you a syntax error. Leave that out.

But besides that, most computer algebraic systems have trouble finding analytic solutions to trig problems.

It isn't difficult, with a bit of graphing, to establish that there are no real roots for that expression. How many imaginary roots would you like to get? Using a different package, I have found 26 imaginary roots numerically; there is no obvious pattern to them.

[Murat]

Thank you very much for your answer. May i ask which other package are you using?

[Walter Roberson]

Maple.