A text book on higher algebra and trigonometry / by A. M. M. Shahidullah & P. K. Bhattacharjee. A. M. M. Shahidullah Algebra Textbooks. Trigonometry Textbooks. QA154.3 .L34 2014 512.9434 23 S525t Chittagong : Omega, c1985. c1985. 1985 Text viii, various pages : eng