Change integral variables

*To*: mathgroup at smc.vnet.net*Subject*: [mg88171] Change integral variables*From*: Budaoy <yaomengliang at gmail.com>*Date*: Sun, 27 Apr 2008 04:57:54 -0400 (EDT)

In Mathematica, how can I change integral variables? For example in integration: Integrate[Sin[Sqrt[x]], x] if I want to use t^2=x to instead x in the integral, how can I achieve this? PS: Does Mathematica have a inertial form of some symbolic command, for instance, the above integration, if I only want an integration form but not an answer, what can I do? Thanks.