UEC Junior 3 · 数学 (Mathematics)

锐角三角函数 (Acute Trigonometric Ratios)

独中统考初三数学的锐角三角函数章节重点在于灵活运用特殊角的三角比值以及各边长之间的函数关系。许多同学容易在复杂的几何图形中混淆正弦、余弦与正切的定义，建议先熟记定义并多练习辅助线的作法以巩固基础。

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