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.
1. Write the following angles in radian measure leaving your answer in π . ( π = 180° )
(i) 60° (??) 325° (???) 45° (??) 75° (?)225°
2. From the 108 meters lighthouse , the angle of depression of a boat at sea is 27° . Find the horizontal distance from the boat to the base of the
lighthouse in meters.
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