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（新课标）2020高考数学大一轮复习第四章三角函数第6课时正、余弦定理课件文.ppt

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第6课时 正、余弦定理,2RsinA,2RsinB,2RsinC,sinA,sinB,sinC,b2c22bccosA,a2c22accosB,a2b22abcosC,无解,一解,两解,一解,无解,一解,谢谢观赏！,

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