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Standards of Learning - Math - Trigonometry
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The standards below outline the content for a one-semester course in trigonometry. Students enrolled in trigonometry are assumed to have mastered those concepts outlined in the Algebra II standards. A thorough treatment of trigonometry is provided through the study of trigonometric definitions, applications, graphing, and solving trigonometric equations and inequalities. Emphasis should also be placed on using connections between right triangle ratios, trigonometric functions, and circular functions. In addition, applications and modeling should be included throughout the course of study. Emphasis should also be placed on oral and written communication concerning the language of mathematics, logic of procedure, and interpretation of results.

Graphing calculators, computers, and other appropriate technology tools will be used to assist in teaching and learning. Graphing utilities enhance the understanding of realistic applications through modeling and aid in the investigation of trigonometric functions and their inverses. They also provide a powerful tool for solving/verifying trigonometric equations and inequalities.
T.1 The student will use the definitions of the six trigonometric functions to find the sine, cosine, tangent, cotangent, secant, and cosecant of an angle in standard position, given a point, other than the origin, on the terminal side of the angle.  Circular function definitions will be connected with trigonometric function definitions.  
T.2 The student, given the value of one trigonometric function, will find the values of the other trigonometric functions.  Properties of the unit circle and definitions of circular functions will be applied.  
T.3 The student will find without the aid of a calculating utility the values of the trigonometric functions of the special angles and their related angles as found in the unit circle.  This will include converting radians to degrees and vice versa.  
T.4 The student will find with the aid of a calculator the value of any trigonometric function and inverse trigonometric function.   
T.5 The student will verify basic trigonometric identities and make substitutions, using the basic identities.  
T.6 The student, given one of the six trigonometric functions in standard form [e.g., y = A sin (Bx + C) + D, where A, B, C, and D are real numbers], will
  1. state the domain and the range of the function;
  2. determine the amplitude, period, phase shift, and vertical shift; and
  3. sketch the graph of the function by using transformations for at least a one-period interval.
The graphing calculator will be used to investigate the effect of changing A, B, C, and D on the graph of a trigonometric functions.
T.7 The student will identify the domain and range of the inverse trigonometric functions and recognize the graphs of these functions.  Restrictions on the domains of the inverse trigonometric functions will be included.  
T.8 The student will solve trigonometric equations that include both infinite solutions and restricted domain solutions and solve basic trigonometric inequalities.  Graphing utilities will be used to solve equations, check for reasonableness of results, and verify algebraic solutions.  
T.9 The student will identify, create, and solve practical problems involving triangles.  Techniques will include using the trigonometric functions, the Pythagorean Theorem, the Law of Sines, and the Law of Cosines.  
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