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三角是中学数学的重要基础,在高等数学、工程技术学科以及邻近的自然科学里,应用也极其广泛,其重要性是众所周知的.中学数学教学大纲里对三角教学提出了明确的要求,安排了比较充裕的教学时间.初中教三角形的解法30课时,约占初中数学总教学时数的6%.高中教三角函数、两角和与差的三角函数以及反三角函数,共计66课时,约占高中数学总教学时数的20%.可见大纲对三角教学是相当重视的.正是由于它的重要,每年高考总少不了有关三角的试题.这些试题不仅说明三角的重要,而且无形之中对中学三角教学起着相当有力的引导作用.人们说,强调大纲千万遍,不如高考题目点一点.大概就是这个意思.
Triangle is an important foundation for middle school mathematics. It is also widely used in advanced mathematics, engineering technology, and the neighboring natural sciences. Its importance is well-known. High school mathematics syllabus puts forward clear requirements for triangular teaching and arranges More abundant teaching time. The junior middle school teaching triangle solution 30 lessons, accounting for about 6% of the total mathematics teaching hours of junior high school. High school teaches trigonometric functions, two-corner and difference trigonometric functions and inverse trigonometric functions, a total of 66 hours, accounting for about 20% of total high school mathematics teaching hours. The visible outline is very important for the teaching of the triangle. It is because of its importance that the annual college entrance examination is always indispensable for questions about the triangle. These questions not only explain the importance of the triangle, but also invisible to the middle school. The teaching of triangles plays a very powerful guiding role. People say that emphasizing outlines is more than a million times. It is not as good as the college entrance examination topic. This is probably the meaning.