Trishul is an Indian Hindi film directed by Yash Chopra and produced by Gulshan Rai in 1978. It is written by Salim-Javed, with music by Khayyam and lyrics by Sahir Ludhianvi. The movie was a "blockbuster" hit at the box office and one of the top grossers of 1978, along with Muqaddar Ka Sikander and Don. Wikipedia