Draw a line, AB. Choose a point O between A and B. Use a protractor to investigate the following questions. 23. In the plane represented by your paper, how many lines can you draw through O that will form a 30° angle with OB? 24. In the plane represented by your paper, how many lines can you draw through O that will form a 90° angle with OB?
Ratios
A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.
Trigonometric Ratios
Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.
Draw a line, AB. Choose a point O between A and B. Use a protractor to investigate the following questions.
23. In the plane represented by your paper, how many lines can you draw
through O that will form a 30°
24. In the plane represented by your paper, how many lines can you draw
through O that will form a 90° angle with OB?
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