Online Algebra Calculator
Many of users do not use powerful Maxima computer algebra system for systematic work, but for ad hoc algebraic calculations – equations, functions, matrixes, etc. only. To do this job, it is not useful to download the whole application from a web site.
Function: ic2 (<solution>, <xval>, <yval>, <dval>) Solves initial value problems for second-order differential equations. Here <solution> is a general solution to the equation, as found by ode2, <xval> gives the initial value for the independent variable in the form <x> = <x0>, <yval> gives the initial value of the dependent variable in the form <y> = <y0>, and <dval> gives the initial value for the first derivative of the dependent variable with respect to independent variable, in the form diff(<y>,<x>) = <dy0> (diff does not have to be quoted).

See ode2 for an example of its usage.
(%o1) true (%i2)