A is not capitalized except at the beginning of the sentence because it is an article.
no you dont
Yes, you should capitalize the letter after a comma in a sentence.
Yes, you should capitalize the first letter after a comma in a sentence.
no you dont have to
Never capitalize "from" in a title, unless it is the first or last word. "From" is a preposition, and prepositions of four letter or less are not supposed to be capitalized. (Some people capitalize longer prepositions, some don't, but that doesn't matter in this case).
People do not capitalize "a" in a sentence because it is not a proper noun. There is no other reason why "a" would be capitalized. If you are talking about getting an A on an assignment, however, it would be capitalized.
I dont think so
Names of people are proper nouns, therefor they require a capital letter.
Yes, you should capitalize "To Whom It May Concern" in a cover letter.
The capitalize() function in Python can be used to capitalize the first letter of a string. It returns a copy of the string with the first letter capitalized and all other letters in lowercase.
Yes, you capitalize Trojans because they are a people.
Yes