The phrase "friendly and trusting" is correct and can be used in written English.
Example: The new puppy was initially timid, but after spending a few days with the family, she became friendly and trusting towards everyone.
The staff member had known the client for some time and had built a strong, friendly and trusting relationship with him.
"It is a friendly and trusting relationship, and we are not looking for ways to make ourselves look better at the expense of the other," said Mr. McConnell, who often unobtrusively makes his way over to the speaker's office via a relatively secluded hallway off his own suite.
The Queensland journalist, who edited Brisbane's Courier Mail and the Australian newspaper for 24 years and now writes a media column in the Australian, describes his relationship with the media proprietor as not close but "friendly and trusting" and says they are of a like mind.
Agreeableness refers to someone who is friendly, compassionate, and trusting.
Make sure the puppies are friendly, curious, and trusting around their littermates and around you.
In social interaction, all individuals appear as friendly and sociable, and face others in a boundless and trusting manner.
Tarek is open, friendly, trusting and introduces Walter to the djembe, the West African drum he expertly plays in a fusion jazz group.
Both men have described their relationship as friendly and cooperative, even trusting.
"Cablegate", on the other hand, involved cables that were routinely shared between members of the US government and armed forces, and trusted figures from friendly nations.
He continued to rely largely on friends and advisors that were known and trusted, and by maintaining friendly relations with the pro-Domitianic faction of the Senate, he incurred hostility which may have been the cause for at least one conspiracy against his life.
"He is extremely friendly, and you can trust him right away".
