Articles are Determiners but all the Determiners are not articles.
Determiners:-
USE OF 'A' (Indefinite Article)
- Before Consonant (singular countable noun)
A Boy, A Girl
- Before 'One'
A one-rupee note, A one-sided way, A One-eyed man
- Before 'yu' Sound
A University, A European, A Unique Book
- Before Occupation
A Doctor, A Farmer
USE OF 'AN'
- Before Vowel (singular countable noun)
An Elephant, An Umbrella
- Before Vowel Sound
An S.D.O, An M.P, An M.A
- Before Occupation
An Engineer
USE OF 'THE'(Definite Article)
The cow, The dog
The Himalayas, The Alps
The East Indies, The West Indies
The Ramayana, The Koran
The Sun, The Moon
The East, The West
The Times of India, The Hindustan Times
The Red Fort, The Taj Mahal
The Radio, The Television
The Best, The worst
The United Nation, The Rotary Club
The Ganga, The Pacific Ocean
The Suez Canal, The Gulf of Mexico
The Roman Empire, The French Revolution
The Head, The Eye
The Second March, The Sixth Class
The Principal, The President
She is the better of two girls
The Toofan Express, The Titanic
The violin, The Guitar
The Navy, The Air Force
NO USE OF 'THE'
English, French
Mathematics, History
January, February
Sunday, Monday
Football, Tennis
Rice, Wheat
Gold, Iron
Breakfast, Lunch
Boys, Cows