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教学目标:1.知识与技能(:1)掌握二倍角公式的原形及特征,提高学生的变形运用的能力(.2)通过综合运用公式,使学生掌握有关的技巧,提高学生分析问题、解决问题的能力.
Teaching objectives: 1. Knowledge and skills (: 1) Grasp the original form and characteristics of the double-angle formula to improve the student’s ability to use the deformation (.2) Through the comprehensive use of formulas, students can master relevant skills, improve student analysis and solve problems. The ability of the problem.