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三角是高中数学传统内容的四大模块(代数,三角,立体几何,解析几何)之一.在教师教学和学生学习时,往往把关注的重点放在了三角函数的性质和图象,三角公式的灵活运用上,把三角的知识作为一个封闭的知识来对待,而忽略了三角知识与方法在其它领域的工具作用.新课标倡导的十条理念之一是:发展学生的数学应用意识,因此我们在教学中,不仅要把三角知识系统化,更要探索三角知识和方法的广泛应用,发挥出工具作用.
The triangle is one of the four modules (Algebra, Trigonometry, Solid Geometry, Analytic Geometry) of the traditional mathematics content of high school. In the teaching of teachers and student learning, the focus of attention is always placed on the nature and image of the trigonometric function. The flexible use of triangular knowledge as a closed knowledge, while ignoring the role of triangular knowledge and methods in other fields. One of the ten concepts advocated by the new curriculum is: the development of students’ awareness of mathematical applications. In teaching, we must not only systematize the triangular knowledge, but also explore the extensive application of triangular knowledge and methods, and play a role as a tool.