求值cos2π/5*tan5π
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求值cos2π/5*tan5π
数值:sin9π/4+cos2π/3+tan5π/4
数值:sin9π/4+cos2π/3+tan5π/4
求值:sin9派/4+cos2派/3+tan5派/4
sin9π/4+cos2π/3+tan5π/4的值.
求值:sin9派/4+cos2派/3+tan5派/4在线等
求值:一、(1+cos20°)/2sin20°-sin10°(cot5°-tan5 °)已知tan(α+ π/4)=-3,求tan2α,cos2α,sin2α 注:π/4=45°啊第二题 已知tan(α+ π/4)=-3,求tan2α,cos2α,sin2α
求值cosπ/5cos2π/5cos4π/5cos8π/5
求值:cos2π/7 * cos4π/7 * cos6π/7
求值cos2π/9*cos4π/9*8π/9
求值:cosπ/7*cos2π/7*cos3π/7
求值:cos2π/7cos4π/7cos8π/7
求值cos2π/9cos4π/9cos8π/9
tan5分之π+tan5分之2π+tan5分之3π+tan5分之4π怎么算
化简(tan5π/4+tan5π/12)/(1-tan5π/12)
化简(tan5π/4+tan5π/12)/(1-tan5π/12) 注意分母啊 细心!
比较大小:tanπ/5,√3,tan5π/12
计算 tanπ/12-tan5π/12