公式默写1 1、和差倍角公式: 班级________姓名:___________ cos(a-b)=______________;cos(a+b)=______________sin(a-b)=______________;sin(a+b)=______________ tan(a-b)=______________;tan(a+b)=______________2、倍角公式: sin2a=_____________;tan2a=__________cos2a=________=________=________3、降幂公式: sina?cosa______ sin2a=______ cos2a=______ 4、辅助角公式: asinx?bcosx________________,其中a、b>0,tanj=______,j?______ 公式默写1 1、和差倍角公式: 班级________姓名:___________ cos(a-b)=______________;cos(a+b)=______________sin(a-b)=______________;sin(a+b)=______________ tan(a-b)=______________;tan(a+b)=______________2、倍角公式: sin2a=_____________;tan2a=__________cos2a=________=________=________3、降幂公式: sina?cosa______ sin2a=______ cos2a=______ 4、辅助角公式: asinx?bcosx ________________,其中a、b>0,tanj=______,j?______ 正弦定理:_____=______=______=_______ 推论:(1)a:b:c=____________ (2)a=2R________; ÛsinA=_______;(边角互化、其余两组同理) (3)面积公式:S=21ab______=__________=__________ 2___cos 余弦定理:a=______________ _ _ _推论:A=____________________ b=______________ _ _ _ _ _ _ cosB=____________________ c=______________ _ _ _ _ _ _ cosC=____________________ 正弦定理:_____=______=______=_______ 推论:(1)a:b:c=____________ (2)a=2R________; ÛsinA=_______;(边角互化、其余两组同理) (3)面积公式:S=2221ab______=__________=__________ 2___cos 余弦定理:a=______________ _ _ _推论:A=____________________ b=____________________ cosB=____________________ c=____________________ cosC=____________________ 22 本文来源:https://www.wddqw.com/doc/29a2e7672d3f5727a5e9856a561252d380eb2091.html