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Trigonometric Ratios. For a right angle triangle, the relationship between lengths of sides and angles is described using the trigonometric ratios. . The 3 primary trigonometric ratios are: sine (sin), cosine (cos) and tangent (tan). For a given angle, A, the primary trig ratios are defined as follows: Sin(A) = hypotenuse.
You have probably met the trigonometric ratios cosine, sine, and tangent in a right angled triangle, and have used them to calculate the sides and angles of those triangles. In this booklet we review the definition of these trigonometric ratios and extend the
DEPARTMENT OF MATHEMATICS AND STATISTICS MAST10012 Introduction to Mathematics Semester 1, 2011 REVISION - TRIGONOMETRY A: Finding trig ratios in the Unit Circle 1. Identify the quadrant that the angle is in:
Trigonometric ratios provide relationships between the sides and angles of a right angle triangle. The three most commonly used ratios are: sine
-Trigonometry is based on angles, distances, and triangles, specifically the relationship between an interior angle in a triangle and the ratio of its side lengths. -Pythagorean theorem allows us to find the length of any side of a right triangle if we know the other two sides.
• I can define the six trigonometric functions. • I can evaluate trigonometric functions. • I can use trigonometric functions to find side lengths of right triangles.
Introduction to Trigonometric Ratios. *There are six trigonometric ratios that you should know: sine, cosine, tangent, cotangent, secant, and cosecant. They are abbreviated sin, cos, tan, cot, sec, and csc, respectively. *These ratios relate the lengths of two sides of a given triangle.
