1. He hid the letter in a drawer.

2. He hided the letter in a drawer.
(Can we use both 'hid' and 'hided' as a past tense? Do you use 'hided' as a past tense for the verb hide?)

There's no such word as "hided."

The principal parts for this verb are hide, hid, hidden, hiding.

You can always find the principal parts of a verb at the beginning of its definition in a dictionary, as here -- http://www.merriam-webster.com/dictionary/hide

They are almost always in this order:
present
simple past
past participle
present participle

The correct past tense form of the verb "hide" is "hid." Therefore, the first sentence is correct: "He hid the letter in a drawer."

On the other hand, "hided" is not a recognized past tense form of the verb "hide" in standard English. It is considered nonstandard or archaic and is not commonly used in modern language. It is important to note that the correct simple past tense form of "hide" is "hid," regardless of the subject (he, she, I, etc.).

To find the correct past tense form of a verb, such as "hide," you can consult a dictionary or reference material specifically designed to provide information on verb conjugations and past tense forms. Regular verbs usually have consistent rules for forming the past tense, while irregular verbs (like "hide") have unique forms that need to be memorized. When in doubt, referring to a reputable resource is always a good way to ensure accuracy.