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正弦、余弦定理是高中数学三角模块的重要组成部分,主要考查考生对正弦、余弦定理及其变式的掌握程度,考查学生灵活、变通运用2个定理的解题能力及计算能力.1考查内容1.1求三角形的边在正弦定理中,可以通过公式a/sin A=b/sin B=c/sin C=2R(R为外接圆半径)来确定角和边之间的关系.一般题目会给出2个角和其中一个角所对应的边,然后通过正弦定理求解另外一个角所对应的边.
The sine and cosine theorem is an important part of the high school mathematics triangle module. It mainly examines candidates’ mastery of the sine and cosine theorem and its variants, and examines students’ flexibility and flexibility in using the two theorems to solve problem-solving abilities and computational power.1 1.1 Finding the Triangle’s Edge In the sine theorem, the relationship between the angle and the edge can be determined by the formula a/sin A=b/sin B=c/sin C=2R (R is the circumcircle radius). The two corners correspond to one of the corners, and then use the sine theorem to solve for the edge of the other corner.