Questions & Answers about В тихом парке я читаю книгу.
Both тихом and парке are in the prepositional case (предложный падеж).
- парк (nominative) → в парке (prepositional)
- тихий (quiet) → в тихом (prepositional masculine singular)
The prepositional case is most often used after в and на when you talk about location (answering the question Где? – Where?).
So в тихом парке means “in the quiet park”, not movement to the park, but being in the park.
The adjective тихом must agree with парке in:
- gender: masculine
- number: singular
- case: prepositional
So you get в тихом парке as a matching adjective–noun pair in the prepositional case.