tan70+tan50-√3tan70tan50的值等于?
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tan70+tan50-√3tan70tan50的值等于?tan70+tan50-√3tan70tan50的值等于?tan70+tan50-√3tan70tan50的值等于?Tan120=tan(70
tan70+tan50-√3tan70tan50的值等于?
tan70+tan50-√3tan70tan50的值等于?
tan70+tan50-√3tan70tan50的值等于?
Tan120=tan(70+50)=(tan70+tan50)/(1-tan70tan50)= －√3.
∴tan70+tan50=-√3(1-tan70tan50)=- √3+(√3)tan70tan50.
∴tan70+tan50-(√3)tan70tan50=-√3.
tan70+tan50+√3tan70tan50=?
tan70+tan50- √3tan70tan50＝?
tan70°+tan50°-√3tan50°tan70°=?
1.tan70°+tan50°-√3tan70°tan50°
tan70°＋tan50°－√3tan70°tan50°＝?
tan70`+tan50`-根号3tan70`tan50=_____
tan70'+tan50'-镙瑰佛3tan50脳tan70=
tan70+tan50-根3tan70tan50
tan70+tan50-√3tan70tan50的值等于?
tan70+tan50-根3tan70tan50等于
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°-［3∧（1/2)］tan70°tan50° 求值
tan70+tan50-根号3tan70tan50的值等于
tan70＋tan50－根3tan70tan50＝?.
tan70°+tan50°-根号3*tan70°*tan50°的值等于( )答案为-根号3
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