 # Trigonometric Ratios Trigonometry – The branch of mathematics that deals with the relations between the sides and angles of triangles, and the calculations.

## Presentation on theme: "Trigonometric Ratios Trigonometry – The branch of mathematics that deals with the relations between the sides and angles of triangles, and the calculations."— Presentation transcript:

Trigonometric Ratios Trigonometry – The branch of mathematics that deals with the relations between the sides and angles of triangles, and the calculations based on them. - Webster’s Collegiate Dictionary Trigonometric Ratio – A ratio of the lengths of sides of a right triangle.

Trigonometric Ratios Sine  A = length of the side opposite the angle length of the hypotenuse Cosine  A = length of the side adjacent to the angle length of the hypotenuse Tangent  A = length of the side opposite the angle length of the side adjacent to the angle S-O-H-C-A-H-T-O-A

Example 4-1f Find sin A, cos A, tan A, sin B, cos B, and tan B. Express each ratio as a fraction and as a decimal.