"demonstrate it to" is correct and usable in written English.
You can use it when you need to ask or suggest that someone show something in order to illustrate how it works. For example: "Can you demonstrate it to me so I can see how easy it is to use?".
History is largely what historians demonstrate it to be, and the photographer's guiding thought, here, for how to portray history is no more a casual affair than is the character of each individual image.
The officer, deeply troubled that the colony's new commander will not appreciate his beloved machine, plans to demonstrate it to a visitor, a morally ambiguous ambassador at large, in the hope that he will vouch for its necessary presence in the community, an eternal reminder of the old commander's ethos and "the old tradition".
We are confident in the capabilities of our system and welcome the opportunity to demonstrate it to the market.
Project leader Mark Post says that the team is creating what could become world's first artificial hamburger, aiming to demonstrate it to the public later this year.
They concluded that expiratory imaging for these nondiagnostic CTPA improved pulmonary arterial enhancement, but they did not demonstrate it to be superior to inspiratory phase scanning for a general population.
This schedule can be used to create an animation of the construction project, which may be useful when helping professional designer to understand the full construction process or demonstrate it to a client.
She demonstrated it to me.
He demonstrated it to Bing Crosby, who used it to tape his broadcasts in advance.
The system backfired earlier this year when the police were demonstrating it to reporters.
In the early 20th century, Americans Irving Brokaw and George H. Browne helped formalize the style created by Haines by demonstrating it to American audiences.
There is no harm in exploring the truth about racism when all moral, scientific, social, historical and genetic evidence demonstrates it to be groundless and ridiculous.
