US President Barack Obama and Brazilian President Dilma Rousseff used a White House visit on Tuesday to turn the page on a spying scandal that had damaged bilateral relations and said they want to work to bolster economic ties.

The presidents agreed to a series of steps to make it easier for people and goods to move between the two countries, including reopening fresh beef trade.

During an hour-long news conference in Washington, Rousseff said "things have changed" since October 2013, when she ­canceled an official state visit after revelations from former National Security ­Agency contractor Edward Snowden that the US had spied on her.

"The change is particularly due to the fact that President Obama and the US ­government have stated on several occasions that they would no ­longer ­engage in intrusive acts of ­spying on friendly countries. I believe President Obama," Rousseff said.

Obama greeted ­Rousseff with a warm hug when she arrived in Washington on Monday, taking her for an ­impromptu visit to a memorial for civil rights leader Martin ­Luther King Jr before a ­working dinner­.

Obama praised Brazil at the news conference as a "global power" and an ­"indispensable partner" ­playing a critical role in addressing ­climate change with a deal to boost renewable power production.

On Rousseff, "I trust her completely," Obama said.

"She's always been very candid and frank with me about the interests of the Brazilian people and how we can work together. She's delivered on what she's promised."

The presidents agreed that the two countries will resume cooperation on cyber issues, with a meeting planned in Brasilia.

They also agreed to take steps so that Americans and Brazilians can travel between the two countries without visas, and to allow Brazilians to apply for expedited "Global Entry" clearance when visiting the US in early 2016.

Rousseff vowed that Brazil will "overcome" its current crisis and resume growth.