The sun rises “east.”
“East” can have this meaning: “in the east.” Then can the sentence above be used?
When a verb of motion is followed by a direction, it is interpreted as the direction of that motion and not as a location where the motion takes place. Thus, the sun rises in the east, and it rises up into the sky. It does not "rise east", which is a nonsensical phrase—it would mean that the direction of its rising was eastward rather than upward.
Use "The sun rises in the east" instead.
"The sun rises east" is simply not said, for whatever reason; to my ear it sounds like it would mean that the sun rises toward the east, which isn't true.
East is also an adverb that is normally used to mean "towards the east" or to refer to the direction of movement to the east, a few examples are as follows:
1- My house faces east.
2- We drove east for two hours.
The sun rises east doesn't sound natural, although the adverb "east" also means in the east according to some English dictionaries. We always hear "the sun rises in the east".