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一、内容与要求 1.理解任意角的概念、弧度的意义,能正确地进行弧度与角度的换算。 2.掌握任意角的正弦、余弦、正切的定义,了解
I. Contents and Requirements 1. Understand the concept of arbitrary angles and the meaning of arcs, and correctly convert arcs and angles. 2. Master the definition of sine, cosine and tangent of any angle and understand