Unofficial PDFs are often scanned by hand. The results? Blurry equations (looks like $\int$ turned into a squiggle), missing pages (pages 502–509 simply vanish), and sideways tables. Try learning Fourier Transforms from a page that is rotated 90 degrees and pixelated.
The text is systematically organized into several major units: bs grewal pdf engineering mathematics
Since you are using a PDF, use digital tools to your advantage: Unofficial PDFs are often scanned by hand
Reading math on a screen is harder than reading a novel. Your brain processes text differently on a backlit screen. missing pages (pages 502–509 simply vanish)
– Includes differential and integral calculus, partial differentiation, multiple integrals, and vector calculus.
If it is a scanned image PDF, use Adobe Acrobat’s "Scan & OCR" feature (paid) or use online OCR tools (use cautiously for small files).