Extend the domain of trigonometric functions using the unit circle. (Algebra 2 - Additional Cluster) - Use special triangles to determine geometrically the values of sine, cosine, tangent for Ο/3, Ο/4 and Ο/6, and use the unit circle to express the values of sine, cosine, and tangent for Οβx, Ο+x, and 2Οβx in terms of their values for x, where x is any real number.
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