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NorthCrawford GeoCh8
Right Triangles and Trigonometry
Term | Definition |
---|---|
Angle of Depression | The angle formed by a horizontal line and the line of sight to an object below the horizontal line. |
Angle of Elevation | The angle formed by a horizontal line and the line of sight to an object above the horizontal line. |
Cosine | Length of leg adjacent to angle A b --------------------------------- = - Length of hypotenuse c |
Law of Cosines | a^2 = b^2 + c^2 - 2bc cos A b^2 = a^2 + c^2 - 2ac cos B c^2 = a^2 + b^2 - 2ab cos C |
Law of Sines | sin A sin B sin C ----- = ----- = ----- a b c |
Pythagorean Triple | A set of nonzero whole numbers. |
Sine | Length of leg opposite angle A a ----------------------- = - Length of hypotenuse c |
Tangent | Length of leg opposite angle A a --------------------------------- = - Length of leg adjacent to angle A b |
Trigonometric Ratios | Similar right triangles have equivalent ratios for their corresponding sides. |