式:_________面积公式:_______=_________同角公式:平方关系:_______________商数关系:_______________诱导公式:______________________________________________________________________________________ ________________________________________________________________________________________________________________________________________________________和差角公式:(1)______________________(2)______________________(3)______________________5、辅助角公式:______________________6、二倍角公式:(1)____________(2)___________=_________=__________(3)_____________________7、降幂公式:(1)__________________(2)___________________(3)_________________8、特殊三角函数值:角度α0°30°45°60°90°120°135°150°180°270°角α弧度sinαcosαtanα常见结构变形:_____________________;_____________________;_____________________;三角函数图像与性质:函数名图像定义域值域周期性单调性奇偶性对称轴对称中心正弦定理: = = = (R为三角形外接圆半径)。余弦定理:
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