"provide a wider" is correct and usable in written English.
You can use it when talking about something becoming more expansive or larger. For example: The new store opening in the mall will provide a wider variety of clothing than the current stores.
Java application producers are also branching out to provide a wider array of services.
"The alternative activities provide a wider scope into the world I will step into.
AWAITING SIGNATURE Would provide a wider range of investment options for the state's tax-sheltered college savings account program.
"However, the complexities and difficulties of partnerships and collaborations provide a wider and more compelling field of analysis.
The information source was split into its components (both source and message) to provide a wider range of applicability.
Its clinics are staffed by doctors and provide a wider range of services that include X-rays at $90 apiece (or two for $150).
But they said they hoped that the new tests would provide a wider range of ratings among different S.U.V.'s and pickups.
But casino entertaiment chiefs are beginning to look to folk, rock and country to provide a wider swath of options for casinogoers.
Almost contemporaneously, a similar movement based in Toulouse arose and concentrated on problems of linguistic and orthographic standardization to provide a wider base for literary endeavour.
Third, the extended spacing of the eyes may provide a wider field of view; it may also widen the lateral field of view and increase anterior depth perception.
The Bush administration's No Child Left Behind Act was supposed to provide a wider and more practical fix by upgrading the teacher corps and requiring schools to teach reading in ways that are known to reach nonautomatic readers.
