tan70+tan50-根3tan70tan50等于
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tan70+tan50-根3tan70tan50等于tan70+tan50-根3tan70tan50等于tan70+tan50-根3tan70tan50等于tan(70+50)=tan120=-√3t
tan70+tan50-根3tan70tan50等于
tan70+tan50-根3tan70tan50等于
tan70+tan50-根3tan70tan50等于
tan(70+50)=tan120=-√3
tan(70+50)=(tan70+tan50)/(1-tan50tan70)=-√3
tan70+tan50=-√3(1-tan50tan70)=-√3+√3tan50tan70
所以tan70+tan50-√3tan50tan70=-√3
tan70+tan50-根3tan70tan50
tan70+tan50-根3tan70tan50等于
tan70`+tan50`-根号3tan70`tan50=_____
tan70'+tan50'-镙瑰佛3tan50脳tan70=
tan70＋tan50－根3tan70tan50＝?.
tan70+tan50+√3tan70tan50=?
tan70+tan50- √3tan70tan50＝?
tan70度+tan50度-根号3*tan70度*tan50度等于
tan70°+tan50°-根号3tan70°tan50°的值等于?
根号3（tan50°tan70°）-tan50°-tan70°
tan70°+tan50°-√3tan50°tan70°=?
tan70°＋tan50°-［3∧（1/2)］tan70°tan50° 求值
1.tan70°+tan50°-√3tan70°tan50°
tan70°＋tan50°－√3tan70°tan50°＝?
tan70+tan50-√3tan70tan50的值等于?
tan70+tan50-根号3tan70tan50的值等于
tan70°+tan50°-根号3*tan70°*tan50°的值等于( )答案为-根号3
求tan7O°+tan50°— 根号3乘于tan70°乘于tan50