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Learning Guide Algebra II~ Trigonometric Ratios & Functions – Unit 13 Learning Targets: I can… DATE I can find the lengths of a right triangle by using trigonometric functions. MATH.AII.11.63 I can define angle measure in radians by using the unit circle. MATH.AII.11.64 I can evaluate trigonometric functions of any angle by using the unit circle. MATH.AII.11.65 I can find angle measures by using inverse functions. Essential Questions: What is an angle of rotation, and how is it measured? How can the sine, cosine, and tangent functions be defined using the unit circle? How can you use a given value of one of the trigonometric functions to calculate the values of the other functions? MATH.AII.11.66 I can solve triangles by using the Laws of Sines and Cosines. MATH.AII.11.67 Key Vocabulary: Secant Cosecant Cotangent Initial side Terminal side Standard position Coterminal Unit Circle Quadrantal circle Reference angle Inverse sine Inverse cosine Inverse tangent Law of Sines Law of laws