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