chapter - 3 - trigonometry chapter-3 - trigonometry formulas chapter-3 - trigonometry - ex 3.1 -or- chapter-3 - trigonometry - ex 3.2 -or- chapter-3 - trigonometry - ex 3.3 -or- chapter-3 - trigonometry - ex 3.4 -or- chapter-3 - trigonometry - ex 3.5 -or- chapter-3 - trigonometry - ex 3.6 -or- chapter-3 - trigonometry - ex 3.7 -or- chapter-3 - trigonometry - ex 3.8 -or- chapter-3 - trigonometry - ex 3.9 -or- chapter-3 - trigonometry - ex 3.10 chapter-3 - trigonometry - ex 3.11