About The N. P. Bali is a prolific author of over 100 books for degree and engineering students. He has been writing books for nearly 40 years. His books on the following topics are well known for their easy comprehension and lucid Algebra, Trigonometry, Differential Calculus, Integral Calculus, Real Analysis, Co-ordinate Geometry, Statics, Dynamics,etc. Table Of Important Results and Formulae General Methods 1. Co-ordinates 2. Direction Cosines and Projections 3. The Plane 4. The Straight Line 5. Two Lines, Intersection of Three Planes 6. Change of Axes 7. The Sphere 8. The Cone 9. The Cylinder 10. The Conicoid College Mathematics,Golden Math Series