Question: how to solve cos * cosh = 1 ?

how to solve for lamda and r in this equtaions...please help

restart

with(LinearAlgebra):

solve(cos(lambda[i])*cosh(lambda[i]) = 1);

Warning, solutions may have been lost

 

0

(1)

evalf(%);

0.

(2)

lambda[i];

lambda[i]

(3)

r[i] := (cos(lambda[i])-cosh(lambda[i]))/(sin(lambda[i])-sinh(lambda[i]));

(cos(lambda[i])-cosh(lambda[i]))/(sin(lambda[i])-sinh(lambda[i]))

(4)

``

Download 1.mw

Please Wait...