tan(π/12)-(1/tan(π/12))
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tan(π/12)-(1/tan(π/12))tan(π/12)-(1/tan(π/12))tan(π/12)-(1/tan(π/12))tan(π/12)-(1/tan(π/12))=[tan&su
tan(π/12)-(1/tan(π/12))
tan(π/12)-(1/tan(π/12))
tan(π/12)-(1/tan(π/12))
tan(π/12)-(1/tan(π/12))
=[tan²(π/12)-1]/tan(π/12)
=-2/{2tan(π/12)/[1-tan²(π/12)]}
=-2/[tan(2×π/12)]
=-2/tan(π/6)
=-2/(√3/3)
=-2√3
tan(π/12)-(1/tan(π/12))
(1-tan^2π/12)/(tanπ/12)化简
计算 tanπ/12+1/tanπ/12
计算tanπ/12 / (1-tan^2π/12)=
tan(π/12)+1/tan(π/12)=啥?
tanπ/12-1/tanπ/12=
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