4.4 Trigonmetric functions of Any Angle. Objective. Evaluate trigonometric functions of any angle Use reference angles to evaluate trig functions. Definitions of Trigonometric Functions of any Angle.
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A means that all trig. functions are positive.S means that all sine and cosecant functions are positive.T means that all tangent and cotangent functions are positive.C means that all cosine and secant functions are positive.