An ending (complementary close) for a formal letter might include :
Yours,
Yours truly,
Yours sincerely,
Sincerely,
Sincerely yours,
Thank you
designation
yours faithfully
A formal tone is the tone when you get surprise or a big deal like business.
A letter of resignation would be formal writing.
yes
An ending (complementary close) for a formal letter might include : Yours, Yours truly, Yours sincerely, Sincerely, Sincerely yours, Thank you
You end a formal letter with "Sincerely," or "Sincerely yours." If you mean how do you conclude your argument, you might try something like "I hope that you will consider me as a tenant. I am looking forward to speaking with you."
One would use formal language in a business letter because it is a formal means of communication. When writing a business letter, one wants the tone to be professional. Formal language can help the writer to achieve this.
No a letter to a famous person would need to be formal to get their attention
If it is a formal letter you end by saying "Sincerely," and signing your name. If it is informal, you might end it with "Fondly," or "Yours Truly" or even "Love."
Well, you use thank you either if it's a formal letter (and in any part of it) or not while you normally use best regards at the end of a formal letter
It is not necessary to print and sign the end of a letter if you are sending it electronically. However, for formal physical letters, printing and signing the letter adds a personal touch and authenticity to the communication.