South Korean President Roh Tae-woo and President Mikhail S. Gorbachev Friday signed a declaration of "trust and cooperation" between the two countries, the Tass news agency reported.

Roh, the first leader in South Korea's history to visit the Soviet Union, was also expected to sign a trade agreement with the Soviets. He arrived in Moscow on Thursday and concluded talks with Gorbachev Friday.Reports in South Korea said Roh would offer loans of $2.5 billion to the Soviet Union during his trip. Diplomatic sources in Seoul said Gorbachev is expected to visit South Korea before or after his trip to Japan in the spring.

The preamble says the two countries "are fully determined to build their relations in the spirit of good-neighborliness, trust and cooperation," Tass said.